sizes: (8 lb. bag, 50 lb. bag)

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Glacial Rock Dust - Mined trace minerals. A natural mineral product produced by thousands of years of glacial action. A wide variety of rocks containing a spectrum of trace minerals are collected and pulverized by the expansion/contraction action of the glacier. From Canadian moraines, this product replaces key elements, reversing soil depletion. Excellent source of readily available calcium, iron, magnesium and potassium plus trace elements and micronutrients. Increases phosphorus availability and improves Cation Exchange Capacity. Apply 10 to 20 pounds per 1000 square feet.