What Is 10-10-10 Fertilizer? The three numbers on a fertilizer label indicate the amount of nitrogen (N), phosphorus (P), and potassium (K) in the bag. These are the three primary macronutrients ...

The best fall fertilizer for cool-season grasses is a high-nitrogen fertilizer with the correct amounts of phosphorus and potassium to address soil deficiencies.

Fertilizers contain nitrogen (N), phosphorus (P), and potassium (K), indicated by three numbers representing their percentage by weight. Nitrogen promotes leafy growth, phosphorus aids energy transfer ...