Which statement about mowing height is true?

• A. Height is always 3 inches for all cool-season grasses
• B. Height is irrelevant to turf health
• C. Height should be selected based on species and use
• D. Height should be determined by leaf color

Answer: (C)

Selecting mowing height depends on the grass species and how the turf will be used. Different grasses have different optimal cutting heights that balance making sure the leaves stay photosynthetically active, encourage a dense, healthy stand, and allow quick recovery after mowing. The purpose of the turf—whether it’s a home lawn, a high-traffic sport area, or a low-cut green—drives how tall or short you should cut. For example, some cool-season lawn grasses tolerate moderate heights well and still maintain good density, while areas that require a very smooth surface (like greens) are mowed much lower, and rough areas are kept taller to protect soil and reduce wear. Because the height choice is tied to both the species and its intended use, it’s not a fixed number and isn’t the same for every situation.

Height being universal (such as always three inches) is not accurate, since different grasses and uses call for different cuts. Saying height is irrelevant to turf health is incorrect because mowing height directly influences photosynthesis, root development, disease pressure, and recovery after mowing. Relying on leaf color alone to set height isn’t reliable, as color can signal stress but doesn’t establish the appropriate mowing level.