NPK (19-19-19) supplies the soil nutrients such as Nitrogen, Phosphorus and Potassium in equal proportion. Useful for all crops as a foliar spray, it helps in improving reproductive and vegetative activities in the plant system. NPK 19:19:19 fertilizers are 100% water-soluble and can be taken up by the plant almost immediately. N - Nitrogen: promotes the growth of leaves and vegetation (LESS in your soil) P - Phosphorus: promotes root and shoot growth (Already in your soil) K - Potassium: regulation of water and nutrient movement in plant cells, purportedly promoting flowering and fruiting. It increases crop yield and quality of crop. It increases plant growth, flowering and fruiting.