Down To Earth Langbeinite (Sul-Po-Mag) is a unique 3-in-1 combination of potassium, magnesium, and sulfur in one naturally occurring mineral. This 5 lb box contains 22% K2O, 11% magnesium, and 22% sulfur, delivering three vital plant nutrients in a single easy application.
Potassium is essential for developing high-quality fruit, magnesium is required for chlorophyll synthesis and lush green growth, and sulfur drives enzyme activation throughout the plant. Because langbeinite is mined from natural deposits rather than manufactured, it fits neatly into organic gardening programs. The 5 lb size is perfect for raised beds, containers, and smaller gardens that need targeted K, Mg, and S nutrition.