![Down To Earth Langbeinite (Sul-Po-Mag) - 5 lb (6/Cs)](http://goodgrow.com/cdn/shop/products/HGC723732-01_d1d05c87-9f0f-4e45-8cff-d9b21d0e9549_{width}x.jpg?v=1632666252)
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.