Bone meal is a mixture of crushed and coarsely ground bones that is used as an organic fertilizer for plants. Bone meal is primarily used as a source of phosphorus when applied as a fertilizer.
Bone meal provides a slow form of natural phosphorus to help plants produce sturdy root systems, hastens maturity and stimulates plant growth.
Bone meal once was often used as a human dietary calcium supplement. Research in the 1980s found that many bone meal preparations were contaminated, and it is no longer recommended as a calcium source for humans. Your plants however, will love it. Hi-Yield Bone Meal Analysis: 0-10-0.