Phosphorus
o GSR PhosRite
A human grade source of phosphate that combines mono-ammonium and mono-potassium, in both ionic and colloidal forms into a low salt, low sodium, low chloride phosphorus that is highly available to plants. Phosphate is often overlooked as the one elemental compound required for most nutrients to enter the cell and become available for plant utilization.
o Rock Phosphate
A unique mined source of natural phosphate, high in calcium that encourages plant growth due to its high energy. A shortage of phosphate can block uptake of nutrients into the plant. As a slow release form of phosphate, if applied at rates of 300 to 500 lbs per acre it is not necessary to apply each year. This product is certified for organic use.