Montana Natural Rock Phosphate (0-3-0)

Montana Natural Rock Phosphate is a granulated soft and hard rock phosphate (as found naturally) that is essential in building a biological soil. It acts as a catalyst in the soil, which in turn increases plant growth. Montana Natural Rock Phosphate also helps with overwintering.

Montana Natural Rock Phosphate is 100% natural, and is listed by the Organic Materials Review Institute (OMRI) as well as Washington State Department of Agriculture (WSDA) Organics for use in production of organic food and fiber.


  • Supplies plants with phosphate and calcium
  • Promotes crown development and health
  • Increases root growth and sugar production

OMRI Organic Materials Review Institute Certification (PDF)
Material Safety Data (PDF)