The healthiest mowing height depends on your grass type: Bermuda grass should be kept at 1.5 to 2.5 inches, fescue at 3 to 4 inches, and Zoysia at 1 to 2 inches. These heights optimize photosynthesis, encourage deep roots, and shade out weeds. In Oklahoma’s hot summers, erring on the higher end of these ranges helps grass survive heat and drought stress. Complete Lawn Care adjusts mowing heights by grass type and season to keep your lawn at its healthiest.
Why Height Matters So Much
Grass blade height directly affects root depth. Taller grass has more leaf surface for photosynthesis, which provides more energy for root growth. Deep roots access more water and nutrients, making the lawn more drought-resistant and resilient. Cut grass too short, and you get shallow roots, weak plants, and a lawn that struggles in Oklahoma’s challenging climate.
Proper height also shades the soil, keeping it cooler in summer and reducing weed seed germination. Scalped lawns have exposed soil that heats up quickly and provides perfect conditions for crabgrass and other weeds.
Bermuda Grass: 1.5 to 2.5 Inches
Bermuda is Oklahoma’s most common lawn grass. It tolerates low mowing better than most grasses, but that doesn’t mean you should scalp it.
Lower end (1.5 inches): Creates a dense, manicured look but requires frequent mowing (often twice weekly) and makes the lawn more vulnerable to stress.
Higher end (2-2.5 inches): More forgiving, requires less frequent mowing, and handles Oklahoma’s summer heat better. This is what we recommend for most homeowners.
Summer adjustment: During the hottest months (July-August), keeping Bermuda at the higher end of its range reduces heat stress.
Fescue: 3 to 4 Inches
Fescue is a cool-season grass that struggles in Oklahoma heat. Proper mowing height is critical for its survival.
Never below 3 inches: Fescue mowed shorter than 3 inches suffers severe heat stress and often dies in Oklahoma summers.
Optimal (3.5-4 inches): The extra height shades roots, reduces soil temperature, and helps fescue survive our hot summers.
Summer adjustment: Always mow fescue at 4 inches during June through August. Yes, it looks longer than the neighbors’ scalped Bermuda, but it’ll actually survive.
Zoysia: 1 to 2 Inches
Zoysia creates a dense, carpet-like lawn and tolerates relatively low mowing heights.
Lower end (1-1.5 inches): Requires reel mowing for clean cuts and more frequent maintenance. Creates a premium appearance.
Higher end (1.5-2 inches): Works well with rotary mowers and is more forgiving. Recommended for most homeowners.
Common Mowing Height Mistakes
Cutting too short: The most common mistake. Homeowners often think shorter looks neater, but it weakens the lawn.
Same height year-round: Optimal height changes with seasons. Raise the deck in summer to help grass handle heat stress.
Treating all grasses the same: Mowing fescue at Bermuda height will kill it. Know what grass you have.
Mowing based on the calendar, not growth: Grass grows at different rates depending on weather. Mow based on height, not schedule.
How to Check Your Mowing Height
Your mower deck setting doesn’t always equal actual cut height. Wheels sink into the turf, decks settle, and blade wear affects height. Use a ruler or tape measure to check actual grass height after mowing. Adjust your deck setting until you’re hitting your target.
Complete Lawn Care’s Approach
We identify your grass type and set mowing height accordingly. We adjust seasonally, raising heights during summer stress periods. Our crews verify actual cut height, not just deck settings. This attention to detail, combined with our 7-step lawn care program, produces healthier lawns that look great and withstand Oklahoma’s challenging climate.
Contact Complete Lawn. Care:
Phone: (918) 605-4646 | Email: [email protected] | Online: completelawncaretulsa.com/get-a-quote