What is a typical annual nitrogen rate for cool-season turfgrass per 1,000 square feet, based on soil testing and guidelines?

• A. 0.5–1 lb N/1000 sq ft
• B. 1–2 lb N/1000 sq ft
• C. 2–4 lb N/1000 sq ft
• D. 5–7 lb N/1000 sq ft

Answer: (C)

Nitrogen is the main nutrient that keeps cool-season turf healthy, green, and actively growing, but you want enough to maintain quality without causing problems from over-fertilization. For established cool-season grasses, guidelines based on soil tests usually target about 2 to 4 pounds of actual nitrogen per 1,000 square feet per year. This range balances achieving good color and density with minimizing growth that leads to excess mowing, disease risk, and environmental losses. In practice, apply nitrogen in multiple smaller doses across the growing season to improve uptake and reduce leaching. The exact amount within that range should be tailored to your soil test results, turf wear, irrigation, and local conditions; if soil fertility is low, you might lean toward the higher end, whereas already fertile soil or goals to limit growth would push toward the lower end. Rates outside this range tend to under-supply or over-fertilize.