Fertoz Organic Phosphorus replacing Calphos with this 2X concentrated granulated phosphate fertilizer. Total Phosphorus: 20% (available phosphorus: 7%), CaO: 31%, SiO2: 26%. The product is derived from soft rock phosphate. Information on content and level of metals may be found in the Label / Specs tab. Phosphate (P2O5) is one of the major macronutrients along with Nitrogen (N), and Potash (K2O).

• Application RatesApply according to soil test recommendations. Incorporate into the soil at or prior to seeding. Rock phosphate applications to soils with pH greater than 5.5 may require greater amounts of incorporation, and more time to react before planting. Phosphate availability can be aided by pH reducing compounds like sulfur, composts or humic acids.