The Dr. Earth Fish Bone Meal (2.5 lbs) is an excellent source of organic phosphorus and calcium, beneficial for all stages of plant growth, particularly for roots, buds, and blooms. This product is pasteurized and infused with beneficial soil microbes, enhancing nutrient availability and promoting healthy plant development. The formula is 3-18-0, meaning it contains 3% nitrogen, 18% phosphorus, and no potassium.