Which component of NPK fertilizers is associated with flowering and fruiting?

The component of NPK fertilizers that is most closely associated with flowering and fruiting is phosphorus. Phosphorus plays a crucial role in plant energy transfer, photosynthesis, and nutrient transport, which are important processes during the reproductive stages of a plant's lifecycle. It helps in the development of flowers and fruits, thereby enhancing the overall yield.

Although potassium is significant for overall plant health and the regulation of various physiological functions, such as water uptake and enzyme activation, phosphorus is specifically linked to the processes that promote flowering and fruiting. Calcium, while important for cell wall structure and growth, is not primarily focused on these reproductive aspects. Nitrogen is essential for vegetative growth and leaf development but does not directly contribute to the flowering and fruiting processes.