Solution-Grade Sulfate of Potash for Fertigation & Hydroponic Use

Diamond K Ultra Fines Sulfate of Potash delivers 50% K₂O and 17% sulfur 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.

Potassium 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.

Guaranteed Analysis

• Soluble Potash (K₂O): 50%
• Sulfur (S): 17% (combined sulfate)
• Chloride: virtually chloride-free
• Particle size: minus 325 mesh (ultra-fine grind)

Application Rates

• Fertigation / drip injection: Apply per crop-specific nutrient management plan; consult a certified crop advisor or agronomist for rates
• Hydroponic: Dissolve to target K concentration in working solution; verify compatibility with other nutrient components before tank mixing
• Foliar / ground spray: Apply per label recommendations

Key Features

• 0-0-50 analysis — high-potassium, chloride-free source; ideal for K-sensitive crops and saline soils
• Ultra-fine minus-325 mesh grind — dissolves rapidly; uniform metering and direct injection into irrigation systems
• Virtually no abrasives — less wear on emitters, filters, and irrigation components
• 17% sulfate sulfur — dual-nutrient benefit; supports protein synthesis and enzyme function
• Organic compatible — suitable for use in certified organic production programs
• 50 lb bag — designed for Diamond K applicators or standard fertigation injection systems

Use in accordance with recommendations of a qualified individual or institution such as a certified crop advisor, agronomist, or university crop extension publication.