N-P-K is a designation used in gardening to indicate which three essential nutrients?

• A. N-P-K
• B. NPK
• C. Primary nutrients
• D. Macronutrients

Answer: (A)

N-P-K names the three nutrients plants need most in larger amounts: nitrogen, phosphorus, and potassium. The hyphenated form is the traditional way fertilizer labels show these three specific elements as separate parts of the mix, making it clear that a product contains these three components in varying proportions. Nitrogen drives leafy growth, phosphorus supports strong roots and flower or fruit development, and potassium boosts overall vigor and stress tolerance. Seeing N-P-K on a label immediately signals these three primary nutrients, rather than a single compound or a broader category. While the shorthand NPK can refer to the same trio, the hyphenated version emphasizes that these are three distinct nutrients. The other options describe broader ideas (categories) rather than naming the exact three nutrients.