Greenway Biotech Inc. Sul-Po-Mag 0-0-21.5 Sulfate of Potash Magnesia (K-Mag) (1 Pound)

- Potassium Magnesium Sulfate fertilizer contains 21.5% Soluble Potash, 10.5% Magnesium, and 21% Sulfur - Potassium Magnesium Sulfate is derived from Sulfate of Potash-Magnesia