What is NPK? Understanding the Numbers on Fertilizer for Cannabis

Ever wonder what the three numbers on the front of plant fertilizer and cannabis nutrients stand for? That is the N-P-K ratio, or the ratio of the three main macronutrients that all plants need to grow: Nitrogen (N), Phosphorus (P), and Potassium (K).

Different plant feeds have different ratios of N-P-K because different types of plants need different ratios, and some plants need more of certain nutrients during certain stages of growth. Cannabis is no exception. In fact, it’s extra…

Click to read the full article