NPK is an abbreviation of the three macronutrients Nitrogen (N), Phosphorus (P) and Potassium (K). This abbreviation can often be found on nutrient packaging.

Learn more about nutrients:

• Absorption Of Water And Nutrients By Marijuana Plants
• Macro Nutrients And Their Effect On Cannabis Plants
• Micro Nutrients And Their Effect On Cannabis Plants

More nutrient definitions:

Nutrients | Nutrient deficiency | Nutrient burn | Macronutrients | Micronutrients | Organic nutrients |