Hi-Yield Super Phosphate Dry Plant Food, 4 lb. is an and highly effective source of phosphorus essential for the healthy growth of roots, stems, and blooms in plants and bulbs. This plant food is designed to support vigorous development by providing the nutrients your garden needs. For bulbs, simply mix several tablespoons with soil when planting to give your plants a strong start. When planting in rows, mix 4 pounds evenly with loose soil along the bottom of a 50-foot trench for optimal results. The product comes in a convenient 4 lb. pour container and features a 0-18-0 formulation tailored to promote robust plant health. Model Number: