What is NPK? Understanding the Numbers on Fertilizer for Cannabis

Herb.co
By Michelle JanikianDec 1, 2018, 5:00 am646 ptsHot
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…

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