Bone meal

Bone meal is a mixture of finely or coarsely ground animal bones and slaughter-house waste products. The average nutrient content is 3.50 per cent N and 21.00 per cent P2O5.

As a slow-release fertilizer, bone meal is primarily used as a source of phosphorus and protein. Finely ground bone meal may provide a quicker release of nutrients than the coarser ground version of bone meal.