Arizona Lawn Mowing Calendar
Published: February 1, 2026 · Updated: April 23, 2026
Arizona's desert climate and alkaline soils create one of the most specialized lawn environments in North America. Bermuda Grass in the summer with winter overseeding into Perennial Ryegrass is the dominant approach in Phoenix and Tucson, creating effectively two mowing seasons within a single calendar year.
Best Mowing Heights for Arizona Lawns
St. Augustine Grass
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)
Arizona Monthly Mowing Schedule
Based on St. Augustine Grass in zone 9a.
Mowing Tips for Arizona
Never mow during peak afternoon heat (12–4pm) in summer. Morning mowing reduces heat stress on cut grass.
Raise mowing height by 15–25mm during heat waves. Taller grass shades roots and reduces soil moisture loss by up to 25%.
Never remove more than one-third of the blade in a single mow. Removing too much causes shock, browning, and weed invasion.
What Makes Mowing in Arizona Different
Mowing in Arizona is shaped by the state's dual-season lawn tradition: Bermuda Grass provides the summer lawn while Perennial Ryegrass is overseeded each fall to provide winter color. This transition — from green Bermuda to green Rye and back again — creates a unique mowing calendar unlike anywhere else in the country. Bermuda mowing runs from April through October at 40-50mm weekly, with scalp-cutting in late September to prepare the seedbed for Rye overseeding. Winter Rye mowing runs from December through April at 50-65mm, transitioning back to Bermuda in late spring. The transition periods — September-October and April-May — require careful management as the two grasses compete; too much irrigation favors Rye and weakens summer Bermuda recovery, while too little water during transition causes visible brown bare areas. Arizona's intense UV radiation and low humidity desiccate cut grass surfaces dramatically faster than in humid states; morning mowing and sharp blades matter meaningfully more here than most places. The state's alkaline caliche soils (pH 7.5-9.0) cause significant iron chlorosis that appears as pale yellow-green grass; chelated iron applications are a standard practice. Water costs and increasingly strict irrigation restrictions in Phoenix and Tucson have made Buffalo Grass and xeriscape alternatives practical for homeowners unwilling or unable to maintain the water budget a green lawn requires in this climate.
Arizona Cities
Frequently Asked Questions
When should I start mowing my lawn in Arizona?
Start mowing in Arizona when grass shows active green growth and soil temperature exceeds 10°C. For zone 9a, this is typically February–March. Set mower at maximum height for the first 2–3 cuts.
What height should I mow St. Augustine Grass in Arizona?
St. Augustine Grass in Arizona 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 Arizona in summer?
In Arizona's zone 9a climate, St. Augustine Grass typically needs mowing every 7–14 days in peak summer. If growth slows in heat, extend the interval.
When should I stop mowing my Arizona lawn in fall?
Warm-season grasses in Arizona go dormant when temperatures drop below 10°C — typically they may not go fully dormant. Final mow at 75mm.
Should I raise my mowing height in Arizona summers?
Yes — raising mowing height by 15–25mm in summer is one of the most important adjustments for Arizona lawns. Taller grass shades roots, retains soil moisture, and reduces heat stress. This applies to all grass types.