Down To Earth Fish Bone Meal 4-12-0 is a marine-based alternative to traditional steamed bone meal and is a great source of organic phosphorus and calcium. As one of the three big nutrients for plants, phosphorous plays a role in both root and bloom development and helps produce high-quality fruit and flowers. Boosts root development meaning plants will grow faster and absorb more water and nutrients from the soil. You will have larger carrots, potatoes, and flowers. DTE Fish Bone Meal 4-12-0 also contains a small amount of organic nitrogen and is an ideal fertilizer for new garden beds, perennials and bulbs.