A slow release organic fertiliser which encourages root development npk 35 20 0 vitax sterilised bonemeal is an organic fertiliser which provides both phosphates and nitrogen two elements essential for healthy plant growth this slow steady release of nutrients over a long period makes bonemeal an ideal fertiliser for bulbs and herbaceous plants shrubs roses fruit trees and strawberries apply as required during the growing season how to use can be applied prior to sowing or planting can be applie