Down to Earth 1# Solution Grade Langbeinite 0-0-21.5 OMRI

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.