Ingredients: Phosphoric Acid from Rock Phosphate Analysis: Available Phosphate (P2O5) 3.00% Description: In addition to supplying phosphorous for blooming flowers and vegetable gardens, Rock Phosphate also provides calcium and small amounts of trace elements. Since it contains no harmful acids associated with ordinary superphosphates, it will not harm beneficial soil organisms and earthworms. For bigger and improved root systems, apply Rock Phosphate to roses, flowering bedding plants, perenials and vegetable gardens for continuous plant nutrition. Application Recommendations: Apply at the rate of 1 lb. per 1,000 sq. feet or 1/2 cup per shrub. Work into topsoil, water thoroughly.