Nitrogen (N) – Nitrogen is largely responsible for rapid growth of green leaves.
Phosphorus (P) – Phosphorus is largely responsible for root growth, as well as flower and fruit development.
Potassium (K) – Potassium is a nutrient that helps the overall functions of the plant perform correctly and supports the plant’s vitality. (Note that potassium is usually provided in the form of potash, also known as K2O)