{"product_id":"zinc-sulfate-fertilizer-20lb","title":"Zinc Sulfate Monohydrate | 35.5% Zn 20 lb Pail","description":"\u003ch2\u003eOMRI-Listed Soluble Zinc \u0026amp; Sulfur in a Resealable 20 lb Pail\u003c\/h2\u003e\u003cp\u003eThis zinc sulfate monohydrate fine powder delivers \u003cstrong\u003e35.5% zinc\u003c\/strong\u003e and \u003cstrong\u003e17.5% sulfur\u003c\/strong\u003e in a 100% water-soluble formula — packaged in a resealable hard plastic pail with screw-top lid for easy handling, precise dispensing, and moisture-free storage. OMRI listed and certified for use in organic agriculture, it's the go-to zinc source for growers correcting deficiencies across soil, foliar, and hydroponic programs.\u003c\/p\u003e\u003cp\u003eZinc drives growth hormone production, chlorophyll synthesis, carbohydrate metabolism, and cellular respiration. Deficiency shows up fast — stunted growth, interveinal chlorosis, and reduced yields. This fast-acting powder gets it back on track quickly.\u003c\/p\u003e\u003ch3\u003eNutrient Analysis\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZinc (Zn):\u003c\/strong\u003e 35.5% maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17.5%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead (Pb):\u003c\/strong\u003e 0.01% maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIron (Fe):\u003c\/strong\u003e 1.0% maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCadmium (Cd):\u003c\/strong\u003e 0.01% maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChlorine (Cl):\u003c\/strong\u003e 1.0% maximum\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplication Rates\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoliar:\u003c\/strong\u003e 2–5 lb\/acre\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydroponic stock solution:\u003c\/strong\u003e Dissolve 0.6 g per liter of water; apply at 1–10 mL\/gallon of working solution to achieve 0.2–2.0 ppm zinc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstant-feed systems:\u003c\/strong\u003e Maintain 0.1–2.0 ppm zinc in nutrient solution\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil application:\u003c\/strong\u003e Broadcast or dissolve and drench to correct zinc-deficient soils\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI listed\u003c\/strong\u003e — certified for use in certified organic production\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% water soluble\u003c\/strong\u003e — fully dissolves for foliar, fertigation, and hydroponic use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine powder\u003c\/strong\u003e — rapid dissolution with minimal agitation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResealable hard plastic pail\u003c\/strong\u003e — screw-top lid keeps contents dry between uses; stackable and easy to store\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 lb size\u003c\/strong\u003e — ideal for small-to-mid scale operations, trials, and growers who prefer smaller pack sizes\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eState restrictions:\u003c\/strong\u003e Not available for shipment to Oregon.\u003c\/p\u003e","brand":"Zinc Nacional","offers":[{"title":"Default Title","offer_id":42225615339604,"sku":"ZN-SUL-FINE-MAX360-20LB-PAIL","price":31.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/image_f3eacb24-5ea3-4aac-99b4-d37751a5017b.png?v=1774387963","url":"https:\/\/customhydronutrients.com\/products\/zinc-sulfate-fertilizer-20lb","provider":"Custom Hydro","version":"1.0","type":"link"}