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Down to Earth 0-3-0 Rock Phosphate, 5lb box
Rock Phosphate has 18% calcium and is essential for building soil phosphate levels for long term plant productivity and for preventing calcium deficient soils.
Should be applied to soils prior to planting and can be mixed with compost or manures for additional soil building benefits. This premium powder grade is an excellent nutrient resource for all types of flowering plants including bulbs, fruits, shrubs, trees, and vegetables.
Soft Rock Phosphate is an untreated, mined material with a natural source of Phosphorus and Calcium that is available more quickly than hard rock phosphate.