Down to Earth Rock Phosphate 0-12-0 Fertilizer

Sourced from a marine sedimentary deposit laid down millions of years ago, Rock Phosphate is a natural, untreated source of phosphorus and calcium. It is essential for building phosphate levels for long-term plant productivity and for preventing calcium deficient soils. Best if applied to soils prior to planting and can be mixed with compost or manures for additional soil benefits. This premium powder grade is an excellent nutrient resource for all types of flowering plants. OMRI Approved (Organic Materials Review Institute)CDFA Approved (Registered Organic Input Material)