Hawaii Lawn Mowing Calendar
Published: February 1, 2026 · Updated: April 23, 2026
Hawaii's tropical and subtropical climate means year-round mowing for most grass types, but the state's unique microclimates — ranging from sea-level resorts to high-altitude volcanic slopes — demand very different approaches depending on where you live and what you grow.
Best Mowing Heights for Hawaii 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)
Hawaii Monthly Mowing Schedule
Based on St. Augustine Grass in zone 12a.
Mowing Tips for Hawaii
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 Hawaii Different
Mowing in Hawaii is a year-round commitment with no true dormant season for most lawns. Bermuda Grass and St. Augustine dominate at lower elevations, while Kentucky Bluegrass can grow at higher elevations on the Big Island and Maui where temperatures are cooler. For warm-season lawns in the lowlands, the primary challenge is managing growth during the wet season — typically November through March for most islands — when Bermuda can easily need mowing twice a week to stay at target height. The dry season slows growth but does not stop it, and maintaining irrigation during dry spells prevents the stress-induced patching that makes Hawaii lawns look uneven. Hawaii's volcanic soils are a significant factor in lawn management: young, rocky soils in newer developments drain extremely quickly and require both deep irrigation and careful mowing height management to prevent drought damage, while older, weathered soils in established neighborhoods retain moisture well but compact under traffic. Tropical diseases including Large Patch (a warm-season version of brown patch) and Zoysia Patch are endemic in Hawaii's humid environment; maintaining correct mowing heights, avoiding evening watering, and not removing more than one-third of the blade in a single cut all reduce disease pressure significantly. On Kauai and the windward sides of other islands, additional rainfall means lawns are almost always growing and almost always need weekly or bi-weekly mowing regardless of season.
Hawaii Cities
Frequently Asked Questions
When should I start mowing my lawn in Hawaii?
Start mowing in Hawaii when grass shows active green growth and soil temperature exceeds 10°C. For zone 12a, 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 Hawaii?
St. Augustine Grass in Hawaii 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 Hawaii in summer?
In Hawaii's zone 12a 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 Hawaii lawn in fall?
Warm-season grasses in Hawaii 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 Hawaii summers?
Yes — raising mowing height by 15–25mm in summer is one of the most important adjustments for Hawaii lawns. Taller grass shades roots, retains soil moisture, and reduces heat stress. This applies to all grass types.