Oklahoma Lawn Mowing Calendar
Published: February 1, 2026 · Updated: April 23, 2026
Oklahoma sits at one of the most complex grass transition zones in North America, where Bermuda Grass dominates the southern and central portions of the state while cool-season Tall Fescue handles the northeastern corner. The Oklahoma City and Tulsa metro areas straddle this boundary, and many lawns contain a mix of both.
Best Mowing Heights for Oklahoma Lawns
Tall Fescue
Ideal: 75mm (3.0")
Summer: 90mm (3.5")
Never below: 50mm
Mow every: 7 days (peak)
Bermuda Grass
Ideal: 32mm (1.3")
Summer: 38mm (1.5")
Never below: 13mm
Mow every: 7 days (peak)
Zoysia Grass
Ideal: 38mm (1.5")
Summer: 45mm (1.8")
Never below: 13mm
Mow every: 14 days (peak)
Oklahoma Monthly Mowing Schedule
Based on Tall Fescue in zone 7a.
Mowing Tips for Oklahoma
The transition zone (zones 6–7) requires adjusting mowing height dramatically between seasons. Summer height should be 25–40mm higher than spring.
If you have Tall Fescue, maintain at 90mm through summer. This is higher than most guides suggest but critical for heat tolerance.
Never scalp warm-season grasses in fall transition. Leave at least 50mm to protect crowns entering dormancy.
What Makes Mowing in Oklahoma Different
Mowing in Oklahoma is defined by extreme temperature swings, persistent drought risk, and the constant management challenge of matching your approach to whichever grass type dominates your lawn. Bermuda Grass lawns in southern and central Oklahoma start growing in April when soil temperatures climb above 15°C, require weekly or bi-weekly mowing through the active summer season, and go dormant in November when frost arrives. Bermuda tolerates Oklahoma's summer heat and drought better than any alternative, but it demands consistent mowing at correct height — 40-50mm for standard varieties, 20-30mm for hybrid Bermuda — and will become thatchy and disease-prone if mowed infrequently and then scalped to catch up. Oklahoma's cool-season Fescue lawns in the northeast, including the Tulsa area, manage the state's summer heat the same way as transition-zone lawns throughout the region: raise height to 90-100mm, allow dormancy rather than forcing growth, and invest heavily in fall overseeding and aeration. The state's red clay soils, iconic across the southern plains, compact severely and drain poorly — annual core aeration is essential for maintaining mowing conditions and preventing the waterlogging that encourages disease in wetter years. Oklahoma's severe thunderstorm season from April through June can make soil conditions unpredictable: mowing waterlogged clay after heavy thunderstorms causes significant compaction damage, so timing mowing around weather events matters more here than in most states.
Oklahoma Cities
Frequently Asked Questions
When should I start mowing my lawn in Oklahoma?
Start mowing in Oklahoma when grass shows active green growth and soil temperature exceeds 10°C. For zone 7a, this is typically March–April. Set mower at maximum height for the first 2–3 cuts.
What height should I mow Tall Fescue in Oklahoma?
Tall Fescue in Oklahoma should be maintained at 75mm during spring and fall, raised to 90mm in summer. Never cut below 50mm.
How often should I mow my lawn in Oklahoma in summer?
In Oklahoma's zone 7a climate, Tall Fescue typically needs mowing every 7–14 days in peak summer. If growth slows in heat, extend the interval.
When should I stop mowing my Oklahoma lawn in fall?
Cool-season grasses in Oklahoma can be mowed until the ground freezes — typically December. Final mow at 65mm.
Should I raise my mowing height in Oklahoma summers?
Yes — raising mowing height by 15–25mm in summer is one of the most important adjustments for Oklahoma lawns. Taller grass shades roots, retains soil moisture, and reduces heat stress. This applies to all grass types.