Potassium Sulfate fertilizer for Nutrigationâ?¢ of all crops. It combines potassium and sulfur, two nutrients essential for plant growth. Haifa SOP is a recommended source of potassium where soil pH needs to be lowered, when sulfur is required, or when N application rates should be limited (e.g. at the end of the season). Providing concentrated nutrition, readily available for plant uptake. It enhances the plant's resistance to drought, frost, insects, and diseases, thus improving yield and quality. Haifa SOP helps gaining higher nutritional value of crops, better taste and appearance, and improved suitability for transport and storage. Haifa SOP is a crystalline product, fast-dissolving, highly soluble and virtually free of chloride. Please note that 25kg bags are also available, you can email us for a quotation