Why do plants need nitrogen

Think of nitrogen as the main fuel for plant growth. Nitrogen’s main purpose is to help plants grow big, lush, green foliage and stems. Nitrogen is used in many processes in the plant—to synthesize amino acids, proteins, chlorophyll, and enzymes.

A good nitrogen source helps your plant grow big and strong, which allows them to more easily set fruit (if you’re growing a fruiting variety), roots (for root crops), or lush leaves (for greens and other leaf veggies).