Down To Earth Fish Bone Meal - 50 lbFISH BONE MEAL 4 12 0 50LB OMRI Down To Earths Fish Bone Meal 4 12 0 is a marine based alternative to traditional terrestrial bone meal options 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, which helps produce high quality fruit and flowers. Phosphorus helps plants take to new soil by boosting root development.