How Often to Mow Zoysia Grass

8 min read · by Laura Kessler · Updated November 11, 2026

How often to mow zoysia grass depends on growth, not a fixed calendar. UC’s figures work out to mowing when the grass is about 1.5 times the height you want to keep, and extension guides say never to remove more than one-third of the leaf in one mowing.

Heights differ by variety and climate, so the sources give slightly different ranges. This guide shows the ranges they share, the trigger height, and what changes in fall.

Mow zoysia by height, not the calendar

Extension guidance does not set a weekly schedule for zoysia. You mow when the grass has grown, and the one-third rule says to remove no more than one-third of the leaf height in one cut. Knowing how often to mow zoysia grass starts with measuring the lawn. UC’s warm-season mowing guidance states the rule directly: only remove one-third of the height at a time.

• Grass height: check the lawn with a ruler, not the calendar.
• Growth pace: the University of Arkansas says zoysia needs less mowing than bermudagrass, so gaps between cuts can be longer.
• Season: cut more often when the leaves are actively growing.

Zoysia mowing height ranges

For zoysia, UC gives a set height of 1/2 to 1 inch, while the University of Tennessee gives 0.75 to 1.5 inches in warm, moist climates and 1.25 to 2 inches in cold, dry ones. Clemson’s standard summer height is higher than UC’s range.

Before you work out how often to mow zoysia grass, pick the height first, and see our guide to the best mowing height for zoysia grass for more detail. The sources differ because they describe different climates and cultivars. The right setting depends on your variety and site. Our reading is that 1 inch is a safe starting point for most home lawns, since it sits inside the UC and Tennessee warm, moist ranges.

When zoysia reaches the trigger height

For how often to mow zoysia grass in practice, the trigger height matters more than the date. UC gives 3/4 to 1 1/2 inches as the height to mow zoysia at when the set height is 1/2 to 1 inch. That pair works out to about 1.5 times the cutting height, which is our reading of the figures.

Only the 1/2 to 1 inch rows match UC’s published pair directly. For a taller setting, keep the one-third rule as the limit and treat the trigger as an estimate you check against the lawn.

How often to mow zoysia grass in spring and summer

UC says to mow zoysia frequently in spring and summer, when the leaves are actively growing. The University of Arkansas adds that zoysia requires less mowing and fertilization than bermudagrass, so the same trigger height produces fewer cuts than it would in bermuda.

The reason is growth, and growth sets how often to mow zoysia grass more than any fixed date. The University of Tennessee notes that zoysia’s lateral growth is much slower than that of most bermudagrasses. Growth pace, not the date, sets how soon the grass reaches its trigger.

• Spring green-up: Clemson says to mow just before green-up at 1 to 1 1/2 inches, without setting the mower too low.
• Peak summer: check the height often, because the trigger comes sooner in fast growth.
• Heat and drought: raise the setting slightly until the stress passes, as Clemson advises.

Fall, winter and dormancy

Clemson’s zoysia maintenance calendar recommends keeping the normal mowing height until the weather starts to cool, and raising the mower slightly once nights fall below 70 F. That gives the turf time to acclimate before the first frost. Once growth slows, how often to mow zoysia grass drops, and UC says mowing can become less frequent or stop altogether as the grass goes dormant. See when the robot mower season starts and ends for timing a robot’s run schedule.

1. Keep the usual height into early fall. Clemson says to continue normal mowing until the weather cools.
2. Raise the mower slightly at night temperatures below 70 F. The taller leaf surface helps the lawn acclimate before frost.
3. Cut less as growth stops. UC describes less frequent mowing or none while the grass is dormant.

Avoiding scalping and thatch

Scalping, or cutting grass too short, happens when zoysia is cut too low in one pass, and thatch builds up when it is mowed high and infrequently, according to the University of Arkansas.

• Step the height down. Clemson warns against setting the mower too low, because it may scalp the lawn.
• Sharpen the blades. Clemson says the mower blade usually needs sharpening about once a month.
• Vertical mow when needed. UC recommends periodic vertical mowing to reduce thatch and scalping.

Setting a robot mower for zoysia

A robot mower follows the same height trigger for how often to mow zoysia grass, and it can cut zoysia at 1 inch or higher. Extension sources say reel mowers are the better tool for low heights. Arkansas extension says zoysia performs best with reel mowers, while a rotary mower with sharp blades set as low as possible without scalping can still do well. The steps below are our reading of that guidance, not a test of any model. Our page on robot mowers for zoysia grass covers the fit in more detail.

1. Check the lowest setting first. Compare the spec sheet with the 1 to 1 1/2 inch range before you buy.
2. Start high on a new or stressed lawn. Begin near 1 1/2 inches, then lower the setting one step at a time.
3. Keep the blades sharp. Dull blades tear the grass instead of cutting it cleanly.
4. Raise the setting in heat or drought. Clemson recommends a slightly higher height until the stress passes.

Frequently asked questions

Sources

• UC IPM: Mowing warm-season grasses (University of California): zoysia set height and mow-when trigger, one-third rule, mowing frequency.
• UC IPM: Zoysiagrass tips (University of California): mowing height and thatch and scalping notes.
• Zoysiagrass Yearly Maintenance Program, HGIC 1217 (Clemson Extension): summer and shade heights, reel note, fall raise, sharpening.
• Turfgrass Maintenance: Mowing, W161-I (University of Tennessee Extension, 2008): climate-based zoysia ranges, one-third rule, height-based mowing.
• Lawn Care Calendar: Zoysiagrass, FSA6122 (University of Arkansas System Division of Agriculture): less mowing than bermudagrass, thatch, reel mower note.

Keep exploring

More from By Yard

Six guides picked for the same topic as this one.

All 130 guides →

01Up next9 min readBy YardHow Often to Mow St. Augustine GrassUpdated Nov 11, 2026028 min readBy YardHow Often to Mow Buffalo Grass (Schedule and Height)Updated Nov 11, 2026038 min readBy YardHow Often to Mow Centipede GrassUpdated Nov 11, 2026048 min readBy YardHow Often to Mow Bermuda Grass by SeasonUpdated Nov 11, 2026059 min readBy YardRobot Mower for Zoysia Grass: Height, Frequency and SetupUpdated Nov 11, 2026068 min readBy YardBest Mowing Height for Zoysia Grass: Summer, Spring and FallUpdated Nov 11, 2026