Use Fish, Blood and Bone to provide your plants with a natural food source that feeds plants nutrients slowly Fish, Blood and Bone can be used to feed flowers, fruit, trees, shrubs and vegetables Apply fish, blood and bone every 4 -6 weeks to sustain good soil fertility Fish Blood and Bone has an NPK fertiliser of 3 - 9 - 3 This product is available a 4 kg , established plants will require 140g - 175g per sq. m