Potassium Sulfate contains Potassium (K) and Sulfur (S), two of the essential nutrients plants need for optimal growth and reaching their full potential. Nearly every major physiological function in plants depends on one or both of these nutrients and here, in the highly available water soluble sulfate form, we offer a high performance solution grade powder that growers can apply with confidence. Designed for efficient delivery and immediate absorption, this 200 mesh powder can be used in reservoirs, fertigation, drip irrigation, or sprinkler applications.