Promotes healthy root growth! This high phosphorous fertilizer is the answer to soil phosphorous deficiencies that can lead to stunted growth, poor blooms, and deformed or small fruit. Phosphorous is an important nutrient in the development of plants' root systems, flowers, and fruit. Easy to use in the garden or on house plants. 5 lb. bag covers 200 - 500 square feet depending on application rate. Guaranteed analysis: 0-46-0.