DERMAFERT NPK 4-5-6 BIO is an organo-mineral NPK fertiliser with a low chlorine content, obtained through a reaction between organic and mineral components, which improves its agronomic efficiency. The organic nitrogen (N) content with a natural slow release, associated with the availability of phosphorous (P), potassium (K) and sulphur trioxide (SO₃), provides a balanced supply of nutrient. The high amount of organic protein matter, promotes soil microbiological activity. DERMAFERT NPK 4-5-6 BIO is particularly suggested for the autumn and spring basal fertilisation, and also on grasses soil and can be used in high value horticultural crops and fruit trees.