What do the three numbers on a bag of fertilizer mean?
The 3 numbers on the bag indicate the percentage of nutrients in the fertilizer. The first number indicates the percentage of Nitrogen (N), the nutrient responsible for green growth. The second number indicates the amount of Phosphorus (P), the nutrient responsible for root, flower, and fruit growth. The final number is the amount of Potassium (K), which is responsible for the overall health of the plant.