Potash Potassium Powder 0-0-50, 50 lb. BagDiamond K UltraFines Sulfur of Potash Potassium 0 0 50 (plus 17% Sulfur) is a soluble powder to address potassium deficiencies and is a vital nutrient for cell wall strength and plant, tree and turf vigor. Crops can use as much as 250 Pounds of Potassium per acre per year, making Potassium first runner up in abundance needed for plants and turf to thrive. You can apply it as a supplement or other natural blended materials to aid in soil deficiencies.