Organic Traditions Rock Phosphate 0-3-0 for soil consists of a natural rock mined from phosphorus rich deposits. The rock is washed free of clay impurities and heated to remove moisture. This pure, mined phosphate rock contains 32% total phosphate. Organic Traditions Rock Phosphate is made from rocks containing high levels of phosphorus. Organic Traditions Rock Phosphate is ideal for improving the quality of your garden soil. Approved for use in organic gardens. Easy to use throughout the growing season before planting. Directions for use: For Light Applications: 2 lbs. per 100 square feet, Medium Applications: 5 lbs. per 100 square feet, Heavy Applications: 10 lbs. per 100 square feet. Broadcast or spread Espoma Rock Phosphate evenly over the entire area. It is recommended that the rock phosphate be incorporated into the soil before seeding or planting. For application during the growing season use the light rates shown above. Size: 7.25 Lb.