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 50 lb bag contains 22% K2O, 11% magnesium, and 22% sulfur, giving your garden three vital nutrients in a single application. Potassium is essential for developing high-quality fruit, magnesium is required for chlorophyll synthesis and healthy green growth, and sulfur drives enzyme activation throughout the plant.
Because langbeinite is mined from natural deposits rather than synthesized, it is a popular choice for organic gardens and soil programs. Use it to correct potassium, magnesium, or sulfur deficiencies or as part of a balanced feeding regimen for fruiting and flowering crops.