DTE Fish Bone Meal is a dry fertilizer that’s an excellent source of organic nitrogen (N), phosphorus (P) and calcium (Ca). The nitrogen and phosphorus are essential nutrients that every plant needs for strong root development and healthy growth and calcium is necessary for the formation of cell walls and membranes. All of which makes this an outstanding fertilizer for new plantings, bulbs and perennials. However, phosphorus plays an important part in the formation of fruits and flowers, so DTE Fish Bone Meal would be especially beneficial to fruiting and flowering trees, plants and shrubs. An excellent alternative to traditional bone meal options OMRI Listed & CDFA Registered Can be used on all types of vegetables, flowers, trees, shrubs and perennials Shop All Down to Earth products here .