{"title":"Potassium Sulfate — Water Soluble Potassium Source","description":"\u003ch2\u003ePotassium Sulfate (SOP) — Chloride-Free Water-Soluble Potassium for Hydroponics \u0026amp; Fertigation\u003c\/h2\u003e\n\u003cp\u003ePotassium sulfate (SOP) is the preferred potassium source for professional hydroponic, greenhouse, and fertigation programs. Nitrogen-free and chloride-free, SOP allows growers to supply potassium independently of nitrogen — essential for maintaining precise N:K ratios during fruiting and finishing stages without driving unwanted vegetative growth.\u003c\/p\u003e\n\u003cp\u003eWith 50–53% K₂O depending on grade, SOP is the highest-analysis chloride-free potassium fertilizer available in water-soluble form. Custom Hydro stocks multiple grades to match your system, crop, and certification requirements.\u003c\/p\u003e\n\n\u003ch3\u003eWhy SOP Over MOP\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-free\u003c\/strong\u003e — no chloride accumulation in recirculating systems or sensitive soils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen-free\u003c\/strong\u003e — precise K control without affecting N:K ratio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfate sulfur co-delivered\u003c\/strong\u003e — 17–18% S supports protein synthesis and enzyme function\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow salt index\u003c\/strong\u003e — safer for sensitive crops and high-EC environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH compatible\u003c\/strong\u003e — neutral to slightly acidic; no adverse pH effects in solution\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable SOP Grades\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrganic SOP Standard Fines 0-0-50 + 17% S\u003c\/strong\u003e — OMRI certified; fine-screened for rapid dissolution\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSOP 3IX 0-0-53 + 18% S\u003c\/strong\u003e — highest-purity crystalline SOP via ion exchange; ultra-low chloride\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHaifa SOP BIO 0-0-52 + 18% S\u003c\/strong\u003e — organic-certified; EU compliant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHaifa SOP GG 0-0-51 + 18% S\u003c\/strong\u003e — greenhouse-grade; fast dissolving; acidic pH\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"organic-sop-0-0-50-standard-fines-50lb","title":"Protassium+ Organic SOP 0-0-50 Standard Fines | 50 lb","description":"\u003ch2\u003eProtassium+ Organic Sulfate of Potash 0-0-50 Standard Fines — 50 lb\u003c\/h2\u003e\n\u003cp\u003eProtassium+ is the only OMRI-certified organic sulfate of potash (SOP) produced naturally through solar evaporation at the Great Salt Lake, Utah. With \u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e, Protassium+ delivers two critical plant nutrients in a single, chloride-free, naturally derived product — accepted for use in certified organic farming in the United States for more than 30 years.\u003c\/p\u003e\n\u003cp\u003eStandard Fines are fine-screened for rapid dissolution in liquid fertilizer solutions, fertigation systems, and hydroponic nutrient programs. No animal manure or waste products are used in production. The solar evaporation process generates no toxic waste and safely returns water drawn from the Great Salt Lake back to it.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e — high-analysis potassium source for efficient nutrient delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur; supports protein synthesis and enzyme activation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI certified organic\u003c\/strong\u003e — accepted for use in certified organic production systems for 30+ years\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-free\u003c\/strong\u003e — low chloride (max 0.8%); safe for chloride-sensitive crops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-screened\u003c\/strong\u003e — rapid dissolution for liquid blends, fertigation, and hydroponic systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNaturally produced\u003c\/strong\u003e — solar evaporation at the Great Salt Lake; no toxic waste; environmentally responsible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEcocert attested\u003c\/strong\u003e — additional third-party organic certification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eOrganic crop production (OMRI certified)\u003c\/li\u003e\n\u003cli\u003eChloride-sensitive crops — berries, potatoes, tobacco, vegetables\u003c\/li\u003e\n\u003cli\u003eLiquid fertilizer solution and suspension blending\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-50 + 17% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 50%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17% combined sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChlorine (Cl) max:\u003c\/strong\u003e 0.8%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDerived from:\u003c\/strong\u003e Potassium Sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e Standard Fines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e OMRI Listed | Ecocert | CDFA Registered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 50 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Protassium+ (Compass Minerals)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA (Ogden, Utah)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e PROTASSIUM+STAND-FINES-50lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-us-west-2.amazonaws.com\/protassium-product-collateral\/Standard_Fines_for_Organic_Production.pdf\" target=\"_blank\"\u003eProduct Label\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-us-west-2.amazonaws.com\/protassium-plus-msds\/USCAN_SDS-_Sulfate_of_Potash-_English-_4Feb2021.pdf\" target=\"_blank\"\u003eSafety Data Sheet (English)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-us-west-2.amazonaws.com\/protassium-plus-msds\/USCAN_SDS-_Sulfate_of_Potash-_Spanish-_4Feb2021.pdf\" target=\"_blank\"\u003eSafety Data Sheet (Spanish)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-us-west-2.amazonaws.com\/protassium-product-collateral\/gsl-1946-cert-standardfines_(12).pdf\" target=\"_blank\"\u003eOMRI Listing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-us-west-2.amazonaws.com\/protassium-product-collateral\/71305347_CDFA.pdf\" target=\"_blank\"\u003eCDFA Registration\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-us-west-2.amazonaws.com\/protassium-product-collateral\/125654-A-E-20220101.pdf\" target=\"_blank\"\u003eEcocert Attestation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-us-west-2.amazonaws.com\/protassium-product-collateral\/Standard_for_Organic_Data_Sheet_2020.pdf\" target=\"_blank\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Compass Minerals","offers":[{"title":"Default Title","offer_id":42225622679636,"sku":"PROTASSIUM+STAND-FINES-50lb.","price":65.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/imageedit_22_6440986004.jpg?v=1753078661"},{"product_id":"potassium-sulfate-standard-fines-1-lb","title":"Organic SOP 0-0-50 Standard Fines | 1 lb","description":"\u003ch2\u003eOrganic Sulfate of Potash 0-0-50 Standard Fines — 1 lb\u003c\/h2\u003e\n\u003cp\u003eOMRI-certified organic sulfate of potash (SOP) produced naturally through solar evaporation. With \u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e, this chloride-free potassium source delivers two critical plant nutrients in a single product — accepted for use in certified organic farming in the United States.\u003c\/p\u003e\n\u003cp\u003eStandard Fines are fine-screened for rapid dissolution in liquid fertilizer solutions, fertigation systems, and hydroponic nutrient programs. No animal manure or waste products are used in production.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e — high-analysis potassium source for efficient nutrient delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur; supports protein synthesis and enzyme activation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI certified organic\u003c\/strong\u003e — accepted for use in certified organic production systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-free\u003c\/strong\u003e — low chloride (max 0.8%); safe for chloride-sensitive crops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-screened\u003c\/strong\u003e — rapid dissolution for liquid blends, fertigation, and hydroponic systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNaturally produced\u003c\/strong\u003e — solar evaporation process; no toxic waste; environmentally responsible\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eOrganic crop production (OMRI certified)\u003c\/li\u003e\n\u003cli\u003eChloride-sensitive crops — berries, potatoes, tobacco, vegetables\u003c\/li\u003e\n\u003cli\u003eLiquid fertilizer solution and suspension blending\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-50 + 17% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 50%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17% combined sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChlorine (Cl) max:\u003c\/strong\u003e 0.8%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDerived from:\u003c\/strong\u003e Potassium Sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e Standard Fines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e OMRI Listed for organic use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 0-0-50-STAND-FINES-1lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225622712404,"sku":"0-0-50-STAND-FINES-1lb.","price":7.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/1_lb_short_jar_image_0_0_50_standard_fines.jpg?v=1752679100"},{"product_id":"potassium-sulfate-standard-fines-4-lb","title":"Organic SOP 0-0-50 Standard Fines | 4 lb","description":"\u003ch2\u003eOrganic Sulfate of Potash 0-0-50 Standard Fines — 4 lb\u003c\/h2\u003e\n\u003cp\u003eOMRI-certified organic sulfate of potash (SOP) produced naturally through solar evaporation. With \u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e, this chloride-free potassium source delivers two critical plant nutrients in a single product — accepted for use in certified organic farming in the United States.\u003c\/p\u003e\n\u003cp\u003eStandard Fines are fine-screened for rapid dissolution in liquid fertilizer solutions, fertigation systems, and hydroponic nutrient programs. No animal manure or waste products are used in production.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e — high-analysis potassium source for efficient nutrient delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur; supports protein synthesis and enzyme activation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI certified organic\u003c\/strong\u003e — accepted for use in certified organic production systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-free\u003c\/strong\u003e — low chloride (max 0.8%); safe for chloride-sensitive crops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-screened\u003c\/strong\u003e — rapid dissolution for liquid blends, fertigation, and hydroponic systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNaturally produced\u003c\/strong\u003e — solar evaporation process; no toxic waste; environmentally responsible\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eOrganic crop production (OMRI certified)\u003c\/li\u003e\n\u003cli\u003eChloride-sensitive crops — berries, potatoes, tobacco, vegetables\u003c\/li\u003e\n\u003cli\u003eLiquid fertilizer solution and suspension blending\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-50 + 17% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 50%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17% combined sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChlorine (Cl) max:\u003c\/strong\u003e 0.8%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDerived from:\u003c\/strong\u003e Potassium Sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e Standard Fines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e OMRI Listed for organic use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 4 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 0-0-50-STAND-FINES-4lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225622745172,"sku":"0-0-50-STAND-FINES-4lb.","price":15.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/four_pound_short_jar_image_0_0_50_standard_fines_20_1_61af6f51-d940-4c6e-abb5-b5836a10c1ee.jpg?v=1752679100"},{"product_id":"potassium-sulfate-standard-fines-20-lb","title":"Organic SOP 0-0-50 Standard Fines | 20 lb","description":"\u003ch2\u003eOrganic Sulfate of Potash 0-0-50 Standard Fines — 20 lb\u003c\/h2\u003e\n\u003cp\u003eOMRI-certified organic sulfate of potash (SOP) produced naturally through solar evaporation. With \u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e, this chloride-free potassium source delivers two critical plant nutrients in a single product — accepted for use in certified organic farming in the United States.\u003c\/p\u003e\n\u003cp\u003eStandard Fines are fine-screened for rapid dissolution in liquid fertilizer solutions, fertigation systems, and hydroponic nutrient programs. No animal manure or waste products are used in production.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e — high-analysis potassium source for efficient nutrient delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur; supports protein synthesis and enzyme activation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI certified organic\u003c\/strong\u003e — accepted for use in certified organic production systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-free\u003c\/strong\u003e — low chloride (max 0.8%); safe for chloride-sensitive crops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-screened\u003c\/strong\u003e — rapid dissolution for liquid blends, fertigation, and hydroponic systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNaturally produced\u003c\/strong\u003e — solar evaporation process; no toxic waste; environmentally responsible\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eOrganic crop production (OMRI certified)\u003c\/li\u003e\n\u003cli\u003eChloride-sensitive crops — berries, potatoes, tobacco, vegetables\u003c\/li\u003e\n\u003cli\u003eLiquid fertilizer solution and suspension blending\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-50 + 17% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 50%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17% combined sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChlorine (Cl) max:\u003c\/strong\u003e 0.8%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDerived from:\u003c\/strong\u003e Potassium Sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e Standard Fines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e OMRI Listed for organic use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 20 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 0-0-50-STAND-FINES-20lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Compass Minerals","offers":[{"title":"Default Title","offer_id":42225622909012,"sku":"0-0-50-STAND-FINES-20lb.","price":50.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/2_gallon_bucket_20_pound_image0_0_50_standard_fines.jpg?v=1752679101"},{"product_id":"potassium-sulfate-standard-fines-40-lb","title":"Organic SOP 0-0-50 Standard Fines | 40 lb","description":"\u003ch2\u003eOrganic Sulfate of Potash 0-0-50 Standard Fines — 40 lb\u003c\/h2\u003e\n\u003cp\u003eOMRI-certified organic sulfate of potash (SOP) produced naturally through solar evaporation. With \u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e, this chloride-free potassium source delivers two critical plant nutrients in a single product — accepted for use in certified organic farming in the United States.\u003c\/p\u003e\n\u003cp\u003eStandard Fines are fine-screened for rapid dissolution in liquid fertilizer solutions, fertigation systems, and hydroponic nutrient programs. No animal manure or waste products are used in production.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50% soluble potash (K₂O)\u003c\/strong\u003e — high-analysis potassium source for efficient nutrient delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur; supports protein synthesis and enzyme activation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI certified organic\u003c\/strong\u003e — accepted for use in certified organic production systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-free\u003c\/strong\u003e — low chloride (max 0.8%); safe for chloride-sensitive crops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-screened\u003c\/strong\u003e — rapid dissolution for liquid blends, fertigation, and hydroponic systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNaturally produced\u003c\/strong\u003e — solar evaporation process; no toxic waste; environmentally responsible\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eOrganic crop production (OMRI certified)\u003c\/li\u003e\n\u003cli\u003eChloride-sensitive crops — berries, potatoes, tobacco, vegetables\u003c\/li\u003e\n\u003cli\u003eLiquid fertilizer solution and suspension blending\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-50 + 17% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 50%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17% combined sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChlorine (Cl) max:\u003c\/strong\u003e 0.8%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDerived from:\u003c\/strong\u003e Potassium Sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e Standard Fines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e OMRI Listed for organic use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 40 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 0-0-50-STAND-FINES-40lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Compass Minerals","offers":[{"title":"Default Title","offer_id":42225622941780,"sku":"0-0-50-STAND-FINES-40lb.","price":80.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/5_gallon_bucket_40_pound_image_standard_fines_0_0_50_40_lb.jpg?v=1752679103"},{"product_id":"haifa-sop-gg-0-0-51-55-lb","title":"Haifa SOP GG 0-0-51 55 lb.","description":"\u003ch2\u003eHaifa SOP GG 0-0-51 — Greenhouse Grade Potassium Sulfate, 55 lb. Bag\u003c\/h2\u003e\u003cp\u003eWhen your operation demands professional-grade potassium nutrition at scale, Haifa SOP GG 0-0-51 delivers. This 55 lb. bag is the standard choice for commercial greenhouse growers, hydroponic facilities, and fertigation programs that require a reliable, high-purity potassium sulfate with consistent performance batch after batch.\u003c\/p\u003e\u003ch3\u003eWhy Growers Choose Haifa SOP\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51% K₂O\u003c\/strong\u003e — high-concentration, nitrogen-free potassium for precise crop nutrition at any growth stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate-sulfur\u003c\/strong\u003e — immediately plant-available, no soil conversion needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid, complete dissolution\u003c\/strong\u003e — 100 kg dissolves in 1,000 L of water in minutes at 20°C with no insoluble residue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow chloride, low salt index (46)\u003c\/strong\u003e — safe for salt-sensitive crops including tomatoes, peppers, cucumbers, and specialty crop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen-free\u003c\/strong\u003e — ideal for late-stage fruiting, ripening, and K-loading phases without disrupting N balance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLowers stock solution pH\u003c\/strong\u003e — helps maintain optimal pH range in fertigation and hydroponic systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\u003cp\u003eUse in hydroponic reservoirs, drip fertigation, NFT, DWC, and foliar programs. Particularly effective during flowering and fruiting when potassium demand peaks. Compatible with most water-soluble fertilizers for custom nutrient formulations.\u003c\/p\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_Label_55lb_bag-7732357300308.pdf?v=1755522816\" title=\"Haifa SOP GG 0-0-51 Fertilizer Label\" rel=\"noopener\" target=\"_blank\"\u003eLabel\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_0-0-51_spec_sheet-7732357300308.pdf?v=1755522930\" title=\"Haifa SOP 0-0-51 specifications\" target=\"_blank\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_MSDS-7732357300308.pdf?v=1755523012\" title=\"Haifa SOP safety data sheet\" rel=\"noopener\" target=\"_blank\"\u003eSafety Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/CDFA_Fertilizer_Product_Database_Haifa_SOP_0-0-51-7732357300308.pdf?v=1755523139\" title=\"CDFA registration and heavy metals report Haifa SOP 0-0-51\" target=\"_blank\"\u003eCDFA Registration \u0026amp; Heavy Metals Report\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Haifa Fertilizers","offers":[{"title":"Default Title","offer_id":42225680646228,"sku":"Haifa-SOP-55lb.","price":41.75,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/haifa_20sop_20gg_2055lb_20bag.jpg?v=1752679475"},{"product_id":"protassium-sop-3ix-0-0-53-fertilizer-50-lb","title":"Protassium+ SOP 3IX 0-0-53 Potassium Sulfate 50 lb","description":"\u003ch2\u003eProtassium+ SOP 3IX 0-0-53 Crystalline Potassium Sulfate — 50 lb\u003c\/h2\u003e\n\u003cp\u003eProtassium+ SOP 3IX is the highest-purity crystalline sulfate of potash available commercially, produced via ion exchange to deliver \u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e. With the lowest chloride content and lowest salt index of any SOP on the market, 3IX is the preferred potassium sulfate for high-value crop production, sensitive hydroponic systems, and precision liquid blend formulation.\u003c\/p\u003e\n\u003cp\u003eThe ultra-fine crystalline form (very low SGN) ensures rapid, complete dissolution with no residue — making 3IX the ideal potassium source for fertigation injection systems, recirculating hydroponic programs, and custom liquid fertilizer blending.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e — highest K₂O content of any SOP formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur co-delivered with potassium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIon exchange production\u003c\/strong\u003e — ultra-low chloride; lowest salt index of any SOP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystalline form\u003c\/strong\u003e — very low SGN for rapid, complete dissolution in water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-sensitive crop safe\u003c\/strong\u003e — ideal for berries, specialty crop, tobacco, potatoes, and vegetables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid blend compatible\u003c\/strong\u003e — dissolves cleanly with no residue in fertigation and hydroponic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eHigh-value chloride-sensitive crop production\u003c\/li\u003e\n\u003cli\u003ePrecision liquid fertilizer blend formulation\u003c\/li\u003e\n\u003cli\u003especialty crop production — bloom and finishing stages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-53 + 18% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 53% minimum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 18% sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Crystalline (very low SGN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduction method:\u003c\/strong\u003e Ion exchange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 50 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Protassium+ (Compass Minerals)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Canada\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e SOP-3IX-50lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Compass Minerals","offers":[{"title":"Default Title","offer_id":42225681006676,"sku":"SOP-3IX-50lb.","price":60.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/protassium_203ix_2050lb_20bag.jpg?v=1753078677"},{"product_id":"sulfate-of-potash-0-0-51-greenhouse-grade-1-lb","title":"Sulfate of Potash 0-0-51 Greenhouse Grade 1 lb.","description":"\u003ch2\u003eSulfate of Potash 0-0-51 — Greenhouse Grade Potassium Sulfate, 1 lb. \u003c\/h2\u003e\n\u003cp\u003eStart your potassium program right with this greenhouse-grade sulfate of potash — one of the most trusted water-soluble potassium sulfate fertilizers in professional horticulture. This 1 lb. size is perfect for trialing in small hydroponic systems, bench-top nutrient formulations, or evaluating SOP before scaling up.\u003c\/p\u003e\n\u003ch3\u003eWhy Growers Choose This SOP\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51% K₂O\u003c\/strong\u003e — high-concentration, nitrogen-free potassium for precise crop nutrition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate-sulfur\u003c\/strong\u003e — immediately plant-available, no soil conversion needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid, complete dissolution\u003c\/strong\u003e — 100 kg dissolves in 1,000 L of water in minutes at 20°C with no insoluble residue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow chloride, low salt index (46)\u003c\/strong\u003e — safe for salt-sensitive crops including tomatoes, peppers, cucumbers, and specialty crop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen-free\u003c\/strong\u003e — ideal for late-stage fruiting, ripening, and K-loading phases\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp\u003eUse in hydroponic reservoirs, drip fertigation, foliar programs, and custom nutrient blends. Particularly effective during flowering and fruiting when potassium demand peaks and nitrogen must remain controlled.\u003c\/p\u003e\n\u003ch3\u003eDocuments\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_0-0-51_spec_sheet-7732364509268.pdf?v=1755578820\" title=\"SOP 0-0-51 specifications\" rel=\"noopener\" target=\"_blank\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_MSDS-7732364509268.pdf?v=1755578915\" title=\"SOP safety data sheet\" target=\"_blank\"\u003eSafety Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/CDFA_Fertilizer_Product_Database_Haifa_SOP_0-0-51-7732364509268.pdf?v=1755578983\" title=\"CDFA registration and heavy metals report SOP 0-0-51\" rel=\"noopener\" target=\"_blank\"\u003eCDFA Registration \u0026amp; Heavy Metals Report\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225699684436,"sku":"Haifa-SOP-1lb.","price":9.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/one_pound_short_jar_image_Hiafa_SOP_20_1.jpg?v=1752679561"},{"product_id":"sulfate-of-potash-0-0-51-greenhouse-grade-4-lb","title":"Sulfate of Potash 0-0-51 GG 4 lb.","description":"\u003ch2\u003eSulfate of Potash 0-0-51 — Greenhouse Grade Potassium Sulfate, 4 lb.\u003c\/h2\u003e\u003cp\u003eA versatile mid-size option for home growers, small commercial operations, and nutrient formulators. This greenhouse-grade sulfate of potash delivers professional-level potassium nutrition in a convenient 4 lb. jar — enough to run multiple reservoir fills or build custom nutrient blends without committing to bulk quantities.\u003c\/p\u003e\u003ch3\u003eWhy Growers Choose This SOP\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51% K₂O\u003c\/strong\u003e — high-concentration, nitrogen-free potassium for precise crop nutrition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate-sulfur\u003c\/strong\u003e — immediately plant-available, no soil conversion needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid, complete dissolution\u003c\/strong\u003e — 100 kg dissolves in 1,000 L of water in minutes at 20°C with no insoluble residue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow chloride, low salt index (46)\u003c\/strong\u003e — safe for salt-sensitive crops including tomatoes, peppers, cucumbers, and specialty crop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen-free\u003c\/strong\u003e — ideal for late-stage fruiting, ripening, and K-loading phases\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\u003cp\u003eUse in hydroponic reservoirs, drip fertigation, foliar programs, and custom nutrient blends. Particularly effective during flowering and fruiting when potassium demand peaks and nitrogen must remain controlled.\u003c\/p\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_0-0-51_spec_sheet-7732364542036.pdf?v=1755579261\" title=\"SOP 0-0-51 specifications\" rel=\"noopener\" target=\"_blank\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_MSDS-7732364542036.pdf?v=1755579463\" title=\"SOP safety data sheet\" target=\"_blank\"\u003eSafety Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/CDFA_Fertilizer_Product_Database_Haifa_SOP_0-0-51-7732364542036.pdf?v=1755579538\" title=\"CDFA registration and heavy metals report SOP 0-0-51\" target=\"_blank\" rel=\"noopener\"\u003eCDFA Registration \u0026amp; Heavy Metals Report\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225699717204,"sku":"Haifa-SOP-4lb.","price":13.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/four_pound_short_jar_image_Haifa_SOP.jpg?v=1752679562"},{"product_id":"sulfate-of-potash-0-0-51-greenhouse-grade-20-lb","title":"Sulfate of Potash 0-0-51 GG 20 lb.","description":"\u003ch2\u003eSulfate of Potash 0-0-51 — Greenhouse Grade Potassium Sulfate, 20 lb.\u003c\/h2\u003e\u003cp\u003eThe go-to size for serious home growers and small commercial operations. This 20 lb. pail of greenhouse-grade sulfate of potash gives you enough to run a full season of reservoir fills, custom nutrient programs, or fertigation schedules — without the footprint of a full bulk bag.\u003c\/p\u003e\u003ch3\u003eWhy Growers Choose This SOP\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51% K₂O\u003c\/strong\u003e — high-concentration, nitrogen-free potassium for precise crop nutrition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate-sulfur\u003c\/strong\u003e — immediately plant-available, no soil conversion needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid, complete dissolution\u003c\/strong\u003e — 100 kg dissolves in 1,000 L of water in minutes at 20°C with no insoluble residue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow chloride, low salt index (46)\u003c\/strong\u003e — safe for salt-sensitive crops including tomatoes, peppers, cucumbers, and specialty crop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen-free\u003c\/strong\u003e — ideal for late-stage fruiting, ripening, and K-loading phases\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\u003cp\u003eUse in hydroponic reservoirs, drip fertigation, foliar programs, and custom nutrient blends. Particularly effective during flowering and fruiting when potassium demand peaks and nitrogen must remain controlled.\u003c\/p\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"SOP 0-0-51 specifications\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_0-0-51_spec_sheet-7732364640340.pdf?v=1755579726\" target=\"_blank\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"SOP safety data sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_MSDS-7732364640340.pdf?v=1755579802\" target=\"_blank\"\u003eSafety Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"CDFA registration and heavy metals report SOP 0-0-51\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/CDFA_Fertilizer_Product_Database_Haifa_SOP_0-0-51-7732364640340.pdf?v=1755579912\" target=\"_blank\"\u003eCDFA Registration \u0026amp; Heavy Metals Report\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225699979348,"sku":"Haifa-SOP-20lb.","price":36.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/2_gallon_bucket_20_pound_image_Haifa_SOP.jpg?v=1752679562"},{"product_id":"potassium-sulfate-0-0-53-fertilizer-1-lb","title":"SOP 3IX 0-0-53 Crystalline Potassium Sulfate 1 lb","description":"\u003ch2\u003eSOP 3IX 0-0-53 Crystalline Potassium Sulfate — 1 lb\u003c\/h2\u003e\n\u003cp\u003eSOP 3IX is a high-purity crystalline sulfate of potash produced via ion exchange, delivering \u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e in an ultra-fine, rapidly dissolving form. With the lowest chloride content of any commercially available SOP and a very low salt index, 3IX is the preferred potassium sulfate for high-value crop production, sensitive hydroponic systems, and precision liquid blend formulation.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e — highest K₂O content of any SOP formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur co-delivered with potassium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIon exchange production\u003c\/strong\u003e — ultra-low chloride; lowest salt index of any SOP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystalline form\u003c\/strong\u003e — very low SGN for rapid, complete dissolution in water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-sensitive crop safe\u003c\/strong\u003e — ideal for berries, specialty crop, tobacco, potatoes, and vegetables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid blend compatible\u003c\/strong\u003e — dissolves cleanly with no residue in fertigation and hydroponic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eHigh-value chloride-sensitive crop production\u003c\/li\u003e\n\u003cli\u003ePrecision liquid fertilizer blend formulation\u003c\/li\u003e\n\u003cli\u003especialty crop production — bloom and finishing stages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-53 + 18% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 53% minimum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 18% sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Crystalline (very low SGN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduction method:\u003c\/strong\u003e Ion exchange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Canada\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e SOP-3IX-1lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225700110420,"sku":"SOP-3IX-1lb.","price":9.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/one_pound_short_jar_image_potassium_sulfate_3ix.jpg?v=1752679562"},{"product_id":"potassium-sulfate-0-0-53-fertilizer-4-lb","title":"SOP 3IX 0-0-53 Crystalline Potassium Sulfate 4 lb","description":"\u003ch2\u003eSOP 3IX 0-0-53 Crystalline Potassium Sulfate — 4 lb\u003c\/h2\u003e\n\u003cp\u003eSOP 3IX is a high-purity crystalline sulfate of potash produced via ion exchange, delivering \u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e in an ultra-fine, rapidly dissolving form. With the lowest chloride content of any commercially available SOP and a very low salt index, 3IX is the preferred potassium sulfate for high-value crop production, sensitive hydroponic systems, and precision liquid blend formulation.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e — highest K₂O content of any SOP formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur co-delivered with potassium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIon exchange production\u003c\/strong\u003e — ultra-low chloride; lowest salt index of any SOP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystalline form\u003c\/strong\u003e — very low SGN for rapid, complete dissolution in water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-sensitive crop safe\u003c\/strong\u003e — ideal for berries, specialty crop, tobacco, potatoes, and vegetables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid blend compatible\u003c\/strong\u003e — dissolves cleanly with no residue in fertigation and hydroponic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eHigh-value chloride-sensitive crop production\u003c\/li\u003e\n\u003cli\u003ePrecision liquid fertilizer blend formulation\u003c\/li\u003e\n\u003cli\u003especialty crop production — bloom and finishing stages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-53 + 18% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 53% minimum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 18% sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Crystalline (very low SGN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduction method:\u003c\/strong\u003e Ion exchange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 4 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Canada\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e SOP-3IX-4lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225700143188,"sku":"SOP-3IX-4lb.","price":13.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/four_pound_short_jar_image_potassium_sulfate_3IX.jpg?v=1752679564"},{"product_id":"potassium-sulfate-0-0-53-fertilizer-20-lb","title":"SOP 3IX 0-0-53 Crystalline Potassium Sulfate 20 lb","description":"\u003ch2\u003eSOP 3IX 0-0-53 Crystalline Potassium Sulfate — 20 lb\u003c\/h2\u003e\n\u003cp\u003eSOP 3IX is a high-purity crystalline sulfate of potash produced via ion exchange, delivering \u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e in an ultra-fine, rapidly dissolving form. With the lowest chloride content of any commercially available SOP and a very low salt index, 3IX is the preferred potassium sulfate for high-value crop production, sensitive hydroponic systems, and precision liquid blend formulation.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e53% soluble potash (K₂O)\u003c\/strong\u003e — highest K₂O content of any SOP formulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate sulfur\u003c\/strong\u003e — immediately plant-available sulfur co-delivered with potassium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIon exchange production\u003c\/strong\u003e — ultra-low chloride; lowest salt index of any SOP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystalline form\u003c\/strong\u003e — very low SGN for rapid, complete dissolution in water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-sensitive crop safe\u003c\/strong\u003e — ideal for berries, specialty crop, tobacco, potatoes, and vegetables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid blend compatible\u003c\/strong\u003e — dissolves cleanly with no residue in fertigation and hydroponic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and soilless nutrient programs\u003c\/li\u003e\n\u003cli\u003eFertigation and drip irrigation systems\u003c\/li\u003e\n\u003cli\u003eHigh-value chloride-sensitive crop production\u003c\/li\u003e\n\u003cli\u003ePrecision liquid fertilizer blend formulation\u003c\/li\u003e\n\u003cli\u003especialty crop production — bloom and finishing stages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-53 + 18% S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 53% minimum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 18% sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Crystalline (very low SGN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduction method:\u003c\/strong\u003e Ion exchange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 20 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Canada\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e SOP-3IX-20lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Compass Minerals","offers":[{"title":"Default Title","offer_id":42225700175956,"sku":"SOP-3IX-20lb.","price":33.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/2_gallon_bucket_20_pound_image_potassium_sulfate_3IX.jpg?v=1752679565"},{"product_id":"sulfate-of-potash-0-0-51-greenhouse-grade-40-lb","title":"Sulfate of Potash 0-0-51 GG 40 lb.","description":"\u003ch2\u003eSulfate of Potash 0-0-51 — Greenhouse Grade Potassium Sulfate, 40 lb.\u003c\/h2\u003e\u003cp\u003eThe preferred bulk size for commercial growers, nutrient formulators, and high-volume hydroponic operations. This 40 lb. pail of greenhouse-grade sulfate of potash delivers a full season’s worth of precision potassium nutrition — ready to dissolve on demand with no residue, no waste.\u003c\/p\u003e\u003ch3\u003eWhy Growers Choose This SOP\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51% K₂O\u003c\/strong\u003e — high-concentration, nitrogen-free potassium for precise crop nutrition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% sulfate-sulfur\u003c\/strong\u003e — immediately plant-available, no soil conversion needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid, complete dissolution\u003c\/strong\u003e — 100 kg dissolves in 1,000 L of water in minutes at 20°C with no insoluble residue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow chloride, low salt index (46)\u003c\/strong\u003e — safe for salt-sensitive crops including tomatoes, peppers, cucumbers, and specialty crop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen-free\u003c\/strong\u003e — ideal for late-stage fruiting, ripening, and K-loading phases\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\u003cp\u003eUse in hydroponic reservoirs, drip fertigation, foliar programs, and custom nutrient blends. Particularly effective during flowering and fruiting when potassium demand peaks and nitrogen must remain controlled.\u003c\/p\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"SOP 0-0-51 specifications\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_0-0-51_spec_sheet-7732376666196.pdf?v=1755582854\" target=\"_blank\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"SOP safety data sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_MSDS-7732376666196.pdf?v=1755582928\" target=\"_blank\"\u003eSafety Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"CDFA registration and heavy metals report SOP 0-0-51\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/CDFA_Fertilizer_Product_Database_Haifa_SOP_0-0-51-7732376666196.pdf?v=1755583012\" target=\"_blank\"\u003eCDFA Registration \u0026amp; Heavy Metals Report\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225723506772,"sku":"Haifa-SOP-40lb.","price":62.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/5_gallon_bucket_40_pound_image_sop_0_0_51.png?v=1773502931"},{"product_id":"solupotasse-r-55-lb-bag","title":"SoluPotasse® SOP 0-0-51 | 55 lb","description":"\u003ch2\u003eBest-in-Class Water-Soluble Potassium Sulfate for Fertigation \u0026amp; Hydroponic Use\u003c\/h2\u003e\u003cp\u003eSoluPotasse® by Tessenderlo Kerley is the original water-soluble grade of sulfate of potash (SOP) — delivering \u003cstrong\u003e51.5% potash (K₂O)\u003c\/strong\u003e and \u003cstrong\u003e18.7% sulfur (S)\u003c\/strong\u003e in the sulfate form. Produced in Belgium to exacting purity standards, SoluPotasse® dissolves rapidly and completely with no residue, making it the preferred potassium source for drip fertigation, hydroponic nutrient solutions, and foliar programs across a wide range of crops.\u003c\/p\u003e\u003cp\u003ePotassium drives fruit sizing, sugar accumulation, water regulation, and stress tolerance. Sulfur in the sulfate form is immediately plant-available and supports protein synthesis and enzyme activation. Together, K and S in SoluPotasse® deliver dual-nutrient value with virtually no chloride and zero nitrates — ideal for chloride-sensitive crops and high-quality produce programs.\u003c\/p\u003e\u003ch3\u003eGuaranteed Analysis\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotash (K₂O):\u003c\/strong\u003e 51.5%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 18.7% (sulfate form)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride:\u003c\/strong\u003e virtually none\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrates:\u003c\/strong\u003e none\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Belgium\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplication Methods\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrip fertigation:\u003c\/strong\u003e Compatible with drip, micro-sprinkler, sprinkler, flood irrigation, and pivot systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydroponic:\u003c\/strong\u003e Dissolves completely; suitable for recirculating and run-to-waste systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlending:\u003c\/strong\u003e Compatible with most fertilizers; do not blend with calcium-containing fertilizers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51.5% K₂O\u003c\/strong\u003e — high-concentration potassium for efficient fertigation dosing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18.7% sulfate-S\u003c\/strong\u003e — immediately plant-available; supports protein synthesis and enzyme function\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDissolves rapidly and completely\u003c\/strong\u003e — no residues; prevents dripper clogging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow pH solution\u003c\/strong\u003e — improves availability of phosphorus, iron, and most micronutrients\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtremely low salt index\u003c\/strong\u003e — safe for sensitive crops and high-frequency fertigation programs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVirtually chloride-free\u003c\/strong\u003e — ideal for chloride-sensitive crops including strawberries, tomatoes, and specialty crop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrate-free\u003c\/strong\u003e — suitable for late-season and ripening programs where nitrogen must be minimized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproves crop quality\u003c\/strong\u003e — increases resistance to transport and storage damage; boosts stress tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e55 lb bag\u003c\/strong\u003e — commercial scale for greenhouse and large fertigation programs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tessenderlo Kerley","offers":[{"title":"Default Title","offer_id":42225724686420,"sku":"SOLUPOTASSE-55LB","price":82.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/SOLUPOTASSE-PNG-WEB-1.png?v=1775399111"},{"product_id":"diamond-k-solution-grade-ultra-fines-sulfate-of-potash-0-0-50","title":"Sulfate of Potash Ultra Fines | 0-0-50 | 50 lb","description":"\u003ch2\u003eSolution-Grade Sulfate of Potash for Fertigation \u0026amp; Hydroponic Use\u003c\/h2\u003e\u003cp\u003eDiamond K Ultra Fines Sulfate of Potash delivers \u003cstrong\u003e50% K₂O and 17% sulfur\u003c\/strong\u003e in a proprietary minus-325 mesh ultra-fine grind — engineered specifically for direct injection into irrigation systems, fertigation programs, and hydroponic nutrient solutions. With virtually no chloride and no abrasives, it protects emitters, filters, and system components while delivering a fast-dissolving, high-purity potassium source that's easy on chloride-sensitive crops.\u003c\/p\u003e\u003cp\u003ePotassium drives water regulation, enzyme activation, and carbohydrate transport. Sulfate-form potassium adds plant-available sulfur without the chloride load of muriate of potash — making SOP the preferred K source for high-value crops, organic programs, and precision fertigation systems.\u003c\/p\u003e\u003ch3\u003eGuaranteed Analysis\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoluble Potash (K₂O):\u003c\/strong\u003e 50%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17% (combined sulfate)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride:\u003c\/strong\u003e virtually chloride-free\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParticle size:\u003c\/strong\u003e minus 325 mesh (ultra-fine grind)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplication Rates\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFertigation \/ drip injection:\u003c\/strong\u003e Apply per crop-specific nutrient management plan; consult a certified crop advisor or agronomist for rates\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydroponic:\u003c\/strong\u003e Dissolve to target K concentration in working solution; verify compatibility with other nutrient components before tank mixing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoliar \/ ground spray:\u003c\/strong\u003e Apply per label recommendations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0-0-50 analysis\u003c\/strong\u003e — high-potassium, chloride-free source; ideal for K-sensitive crops and saline soils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-fine minus-325 mesh grind\u003c\/strong\u003e — dissolves rapidly; uniform metering and direct injection into irrigation systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVirtually no abrasives\u003c\/strong\u003e — less wear on emitters, filters, and irrigation components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17% sulfate sulfur\u003c\/strong\u003e — dual-nutrient benefit; supports protein synthesis and enzyme function\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrganic compatible\u003c\/strong\u003e — suitable for use in certified organic production programs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 lb bag\u003c\/strong\u003e — designed for Diamond K applicators or standard fertigation injection systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eUse in accordance with recommendations of a qualified individual or institution such as a certified crop advisor, agronomist, or university crop extension publication.\u003c\/p\u003e","brand":"Diamond K","offers":[{"title":"Default Title","offer_id":42839766401108,"sku":"DIAMONDK-SOP-UFINES-50LB","price":47.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/DIAMOND-UFINES_l.jpg?v=1768811808"},{"product_id":"haifa-sop-bio-0-0-52","title":"Haifa SOP BIO Organic 0-0-52 55 lb","description":"\u003ch2\u003ePremium Organic-Certified Potassium Sulfate for Sustainable Agriculture\u003c\/h2\u003e\n\u003cp\u003eHaifa SOP Bio delivers chloride-free potassium and sulfur in a fully water-soluble formula certified for organic production under EU regulations (EC) 834\/2007 and (EC) 889\/2008. With 52% K₂O and 18% sulfur, this premium-grade potassium sulfate provides essential nutrients that enhance crop quality, improve stress tolerance, and maximize storage life—all while meeting the strict standards required for certified organic operations.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrganic Certification:\u003c\/strong\u003e Approved for use in organic agriculture and horticulture under EU Directives, making it ideal for certified organic growers and transitioning operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChloride-Free Potassium:\u003c\/strong\u003e Sulfate form prevents chloride accumulation and salt stress, particularly important for chloride-sensitive crops like berries, tobacco, potatoes, and tree fruits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Nutrient Action:\u003c\/strong\u003e Supplies both potassium (43% K, 52% K₂O) and sulfur (18% S) in plant-available forms for synergistic crop benefits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Solubility:\u003c\/strong\u003e Dissolves fully in water for fertigation, drip irrigation, foliar application, and hydroponic systems without clogging or residue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Enhancement:\u003c\/strong\u003e Increases dry matter content, sugar levels, firmness, color development, and post-harvest shelf life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStress Resistance:\u003c\/strong\u003e Strengthens cell walls, improves drought tolerance, and enhances natural disease resistance through optimized potassium nutrition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eNutrient\u003c\/th\u003e\n\u003cth\u003eContent\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotassium (K₂O)\u003c\/td\u003e\n\u003ctd\u003e52.0%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotassium (K)\u003c\/td\u003e\n\u003ctd\u003e43.0%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSulfur (S)\u003c\/td\u003e\n\u003ctd\u003e18.0%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSulfate (SO₃)\u003c\/td\u003e\n\u003ctd\u003e45.0%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eAnalysis:\u003c\/strong\u003e 0-0-52 (N-P₂O₅-K₂O)\u003cbr\u003e\u003cstrong\u003eForm:\u003c\/strong\u003e Water-soluble crystalline powder\u003cbr\u003e\u003cstrong\u003eChloride content:\u003c\/strong\u003e \u0026lt;2% (chloride-free grade)\u003cbr\u003e\u003cstrong\u003ePackage size:\u003c\/strong\u003e 55 lb. bag\u003c\/p\u003e\n\u003ch3\u003eApplication Guidelines\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFertigation\/Drip Irrigation:\u003c\/strong\u003e Apply 10-30 lbs per acre per week during fruit development and maturation stages. Dissolve completely before injection. Adjust rates based on soil tests and crop demand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFoliar Application:\u003c\/strong\u003e Mix 3-5 lbs per 100 gallons of water. Apply during fruit sizing and ripening to enhance quality parameters. Add a non-ionic surfactant for improved uptake.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoil Application:\u003c\/strong\u003e Broadcast or band 50-150 lbs per acre depending on soil test results and crop requirements. Incorporate before planting or side-dress during the growing season.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHydroponics:\u003c\/strong\u003e Maintain 200-300 ppm K in nutrient solution for most crops. Adjust based on crop type, growth stage, and production goals. Monitor EC after addition.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: Do not tank-mix with calcium-based fertilizers to avoid precipitation. Compatible with most other water-soluble fertilizers.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy Potassium Sulfate for Organic Production?\u003c\/h3\u003e\n\u003cp\u003ePotassium is essential for enzyme activation, protein synthesis, water regulation, and carbohydrate translocation. It directly influences crop quality attributes including sugar content, acidity, firmness, color, and storage potential. Sulfur supports protein formation, enzyme function, and chlorophyll production while enhancing nitrogen use efficiency.\u003c\/p\u003e\n\u003cp\u003eUnlike potassium chloride (muriate of potash), potassium sulfate provides potassium without chloride, preventing salt accumulation and chloride toxicity in sensitive crops. The sulfate form also supplies valuable sulfur, making SOP Bio a dual-purpose nutrient source that supports both yield and quality.\u003c\/p\u003e\n\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\u003cp\u003eCertified organic operations, chloride-sensitive crops (berries, grapes, tobacco, potatoes, citrus, stone fruits), greenhouse production, hydroponic systems, high-value vegetables, and any application where premium quality and chloride-free nutrition are priorities.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eHaifa SOP Bio combines the agronomic performance professional growers demand with the organic certification sustainable agriculture requires.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/sop-bio-spec.pdf?v=1773503966\" target=\"_blank\" title=\"Haifa SOP BIO 0-0-52 specifications sheet\" rel=\"noopener\"\u003e\u003cem\u003eSpecification Sheet\u003c\/em\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_Bio_0-0-52_Label1.pdf?v=1773503966\" target=\"_blank\" title=\"Haifa SOP BIO 0-0-52 fertilizer label\" rel=\"noopener\"\u003e\u003cem\u003eLABEL\u003c\/em\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Haifa_SOP_BIO_0-0-52_MSDS.pdf?v=1773503965\" target=\"_blank\" title=\"safety data sheet\" rel=\"noopener\"\u003e\u003cem\u003eSDS\u003c\/em\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/hnb-19779-cert_1.pdf?v=1773504299\" target=\"_blank\" title=\"OMRI certificate for Haifa SOP BIO 0-0-52 fertilizer\" rel=\"noopener\"\u003e\u003cem\u003eOMRI CERTIFICATE\u003c\/em\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Haifa Fertilizers","offers":[{"title":"Default Title","offer_id":42898580963412,"sku":"Haifa-BIO-55lb.","price":40.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/rn-image_picker_lib_temp_c74d2a37-7583-410d-b123-4d3b48ae5641.webp?v=1770674940"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/collections\/potassium_sulfate_haifa_and_compass_category.jpg?v=1753771945","url":"https:\/\/customhydronutrients.com\/collections\/potassium-sulfate-1.oembed?page=2","provider":"Custom Hydro","version":"1.0","type":"link"}