Which mowing height is commonly recommended for most turf grasses during active growth?

• A. About 1 inch
• B. About 4 to 6 inches
• C. About 2 to 3 inches, depending on species
• D. About 6 to 8 inches

Answer: (C)

During active growth, the goal is to have enough leaf surface for robust photosynthesis without stressing the plant. About 2 to 3 inches of mowing height strikes that balance for most turf grasses, with small adjustments based on the species. This height keeps the crown shaded enough to stay cool and hydrated, supports a dense turf that crowds out weeds, and allows roots to stay strong.

Mowing much shorter, around one inch, can scalp the turf, weaken the root system, and make it more susceptible to heat, drought, and disease. Mowing too tall, in the 4–6 inch or higher range, reduces light to the lower leaves, promotes thatch buildup, and encourages weed intrusion while producing a less dense stand. Some species tolerate slight deviations within the 2–3 inch window, so adjust within that range according to the specific grass type.