Down To Earth Langbeinite (Sul-Po-Mag) 0 - 0 - 22

A unique 3-in-1 combination of potassium, magnesium and sulfur, langbeinite is a naturally occurring source of these three vital plant nutrients. Potassium is essential for high-quality fruit, magnesium is required for the synthesis of chlorophyll and sulfur is needed for enzyme activation. Contains 22% K2O, 11% Mg and 22% S.