Keystone75 is a concentrated colloidal mineral blend that is designed to provide a balanced supply of Calcium, Phosphorous and seventy-five trace minerals in a synergistic mixture of humate material. Keystone75 is micronized to an extremely small particle size, which guarantees that it is highly bioavailable and versatile for effective use as a foliar or soil application. The abundance of trace minerals that Keystone75 provides function as cofactors which facilitate all of the enzymatic functions of the plant, therefore producing plants that grow to a higher genetic potential. The calcium and phosphorus supplied by keystone are highly plant available without being water soluble and therefore have no inhibitory effects on the beneficial soil microorganisms. In fact, Keystone75 proves to be a very high quality catalyst for beneficial soil microbes. 

The most common usage rate for this product is 1 - 3g per gallon for soil applications. 

For foliar applications use 0.2 - 0.5g per gallon. 

For best results analyze your feed solution through a reputable lab.