Bonemeal is a slow-release fertiliser produced from sterilised bonemeal. It contains two elements essential for healthy plant growth - phosphate and nitrogen. It is the slow release of nutrients over an extended period of time which makes Bonemeal an ideal fertiliser for a wide variety of crops and plants. 10kg tub. Store in a cool, dry place and keep out of reach of children and pets. If used in an area close to livestock such as cattle, deer, sheep and goats ensure the treated area is secure to prevent access. N 3.5% P 6.7%.