What are the three parts of a fertilizer label?

• A. Nitrogen (N), Phosphorus (P) and Potassium (K)
• B. Nitrogen (N), Calcium (Ca) and Magnesium (Mg)
• C. Phosphorus (P), Potassium (K) and Calcium (Ca)
• D. Nitrogen (N), Phosphorus (P) and Sulfur (S)

Answer: (A)

Fertilizer labels emphasize the three primary nutrients in the largest amounts, shown as N, P, and K. This trio is the standard N-P-K part of the guaranteed analysis you’ll see on most bags. Nitrogen drives leafy growth and green color, phosphorus supports root development and flowering, and potassium boosts overall vigor, stress tolerance, and disease resistance. The other elements people see on labels (like calcium, magnesium, or sulfur) are important too but are not the three-part core that the label highlights. So the best answer lists nitrogen, phosphorus, and potassium.