NPK fertilizer contains three key nutrients that plants need for healthy growth: nitrogen (N), phosphorus (P), and potassium (K); the numbers (13:13:21) represent the ratio of these nutrients., NPK fertilizer is water-soluble, which means that it can be easily dissolved and applied to plants through irrigation systems or by hand., Phosphorus content in NPK fertilizer is beneficial for promoting healthy root growth and potassium content in NPK fertilizer can help improve the development of fruits and flowers.
