What distinguishes complete fertilizers from high-nitrogen products?

• A. High-nitrogen products emphasize nitrogen and do not contain any phosphorus or potassium.
• B. Complete fertilizers provide N-P-K plus micronutrients.
• C. Complete fertilizers are slow-release only.
• D. High-nitrogen products are never used on lawns.

Answer: (B)

A complete fertilizer includes all three primary macronutrients—nitrogen, phosphorus, and potassium—and also provides micronutrients. This means it supports overall plant nutrition, not just leafy growth, by supplying a balanced mix of nutrients that most plants need for roots, flowering, and development. A high-nitrogen product, on the other hand, is designed to deliver a high amount of nitrogen to boost green, rapid growth and leaf production, often with little or no phosphorus or potassium. While some high-nitrogen formulas may include small amounts of P, K, or micronutrients, they’re not intended to be a balanced, all-in-one nutrient source like a complete fertilizer typically is.

That’s why complete fertilizers are described as providing N-P-K plus micronutrients. The other statements don’t fit as well: complete fertilizers aren’t restricted to slow-release forms, and high-nitrogen products are commonly used on lawns, not never used there. Also, high-nitrogen products don’t necessarily lack all phosphorus or potassium in every case.