Organic Potassium Sulfate — OMRI Certified SOP

Organic Potassium Sulfate — OMRI Certified Sulfate of Potash for Organic Production

Not all potassium fertilizers qualify for certified organic production. Potassium sulfate (SOP) is one of the few potassium sources approved for use in organic agriculture — but only when produced through approved natural processes and certified by recognized organic certifiers. Custom Hydro stocks OMRI-certified organic SOP from trusted sources, produced through solar evaporation and natural mineral extraction with no synthetic processing or waste byproducts.

Why SOP for Organic Production

• OMRI certified — accepted for use in certified organic farming in the USA
• Naturally derived — solar evaporation and natural mineral extraction; no synthetic processing
• Chloride-free — low chloride content; safe for chloride-sensitive organic crops
• Dual nutrient — potassium and sulfate sulfur in a single certified input
• No toxic waste — environmentally responsible production process

Available Organic SOP Products

• Organic SOP Standard Fines 0-0-50 + 17% S — Protassium+ OMRI certified; fine-screened for rapid dissolution; solar evaporation produced at the Great Salt Lake, Utah
• Haifa SOP BIO 0-0-52 + 18% S — organic-certified; EU compliant (EC 834/2007 & 889/2008); Ecocert attested