Fish blood and bone fertiliser, it may sound pretty disgusting but this unusual fertiliser is in fact hugely popular with professional, and serious gardeners.
This begs the question why? Well, first and foremost it's exceptionally eco-friendly stuff. A by-product of the fishing industry, these materials would usually be discarded. However, they just happen to contain exactly the right sort of nutrients to be the perfect "NPK" fertiliser. For example, the fish blood is rich in Nitrogen.
With no special industrial chemical processes needed to create or extract the nutrients, this is about as green as it can get. Fish blood and bone fertliser is the natural choice, organic and exceptional quality. It is also readily available in different guises from many leading home and garden brands.