This naturally mined mineral product is an excellent re-mineralizer for depleted soils. Azomite is a hydrated sodium calcium aluminosilicate (HSCAS) containing other minerals and trace elements. It is listed for organic plant and livestock production by the Organic Materials Review Institute (OMRI). This ultra-fine micronized form is great for coating seeds for maximum germination. It is also good for potting soil and both green and aged compost. May be topically broadcast as well. Apply 10 lbs per 100 sq ft.