Best Mowing Height for Zoysia Grass: Summer, Spring and Fall

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

The best mowing height for zoysia grass is about 1.5 inches for most cultivars. Clemson HGIC gives an acceptable summer range of 1 to 2.5 inches. The right number within that range depends on the cultivar, the amount of shade, and how stressed the lawn is.

Best mowing height for zoysia grass by cultivar

The cultivar matters more than any other single factor. Fine-textured zoysia does well at a lower cut, while coarser types need more leaf to stay healthy. According to UF/IFAS Extension, ‘Cashmere’ does well at 0.5 to 1.5 inches, while medium and coarse-textured varieties such as ‘EmpireTurf’ take 1.5 to 2.5 inches.

If you do not know which cultivar is growing in your yard, check the sod invoice or the installer’s records. Knowing the cultivar lets you narrow the best mowing height for zoysia grass to a single target. Without that, a height near 1.5 inches sits in the middle of the ranges above and is a safe starting point. This is our reading of the sources, not a rule any of them states for unknown lawns.

Summer mowing height: 1.5 inches for most lawns

Clemson HGIC says turfgrass growers recommend a mowing height of 1.5 inches for most zoysia cultivars during summer, from May through August. The acceptable range runs from 1 to 2.5 inches. That range gives you room to adjust without cutting so low that the lawn thins.

Clemson’s 1.5-inch figure sits in the lower half of that summer range, which leaves room to go higher during heat. Our reading is that the best mowing height for zoysia grass in a hot, dry July is usually a step above the normal setting, not a step below it. Clemson’s stress advice points the same way.

Clemson also gives a separate rule for shade, covered in the section below. Keep the summer setting at 1.5 inches unless the lawn shows one of the conditions that calls for a higher cut.

When to raise the mowing height

Zoysia should be cut higher when light or water is limited, and Clemson lists two clear cases. In partial shade, it recommends mowing at 2 to 2.5 inches, so the best mowing height for zoysia grass under trees is higher than in open sun. During heat, drought, or a lack of rainfall, it advises slightly raising the mowing height until the stress is gone.

• Partial shade: cut at 2 to 2.5 inches.
• Heat and drought: raise the cut slightly until conditions improve.
• Lack of rain: treat it the same way as drought, per Clemson.

UF/IFAS Extension also notes that letting blades grow to the maximum mowing height produces a healthier lawn that tolerates drought better and is less exposed to pests and disease. Our reading is that a taller cut helps most in the stressed months, not only in shade. Our note on the mowing height for shade grass covers the shaded case in more detail.

How often to mow zoysia grass

LSU AgCenter says homeowners can mow once a week or three to four times per month during the active growing season. LSU notes that bermudagrass may need more frequent mowing than zoysia. How often you mow matters as much as the setting, so the right height works only with a steady schedule.

LSU describes the one-third rule as “more of a general guideline” and says that the leaf blade should never lose more than one-third of its height in a single mowing. At a 1.5 inch cut, that means mowing when the grass reaches about 2.25 inches. Our reading is that a lawn left to grow past that point loses too much at once, so a regular schedule matters more than measuring each pass.

Spring and fall mowing height

In late winter and early spring, Clemson recommends setting the mower to around 1 to 1.5 inches, done just before green-up. The lower setting helps the lawn clear dormant growth, but it should not go lower than that range. The spring setting is lower than summer, so the target height changes with the calendar.

1. Late winter. Set the cut to 1 to 1.5 inches shortly before the grass starts to green up, which Clemson places between January and April.
2. Summer. Move up to about 1.5 inches for most cultivars, or 2 to 2.5 inches in shade.
3. Fall. Keep the normal height until nights drop below 70 F, then raise the mower slightly before the first frost.

Blade sharpness and avoiding scalping

Sharp blades are part of setting the best mowing height for zoysia grass. Clemson advises mowing with a sharp blade during the summer months and sharpening about once a month in summer, or after roughly every 15,000 square feet mowed. Dull blades tear grass instead of cutting it, leaving ragged tips that are more open to disease.

• Scalping: removing too much leaf in one pass, often after dropping the height too fast (see cutting grass too short).
• Weeds: LSU says regular mowing at the correct height helps prevent scalping and reduces weed encroachment.
• Blade wear: check the edge each time you mow in summer.

Setting a robot mower for zoysia grass

The heights above come from extension guidance, not from robot mower manuals, so the steps below are our reading of how they apply to a robot mower. Clemson says mowing heights below 1 inch need a reel-type mower for satisfactory results, so a rotary robot mower fits best at 1 inch and above, and our guide to robot mowers for zoysia grass goes deeper. Start by checking the lowest cutting height on the spec sheet against the best mowing height for zoysia grass you need. If that lowest setting is above the range you need, the mower cannot give the lawn the cut it needs.

1. Compare the spec sheet first. Make sure the lowest setting is 1.5 inches or lower for most lawns and the highest setting reaches 2.5 inches for shaded zones.
2. Start at 1.5 inches in summer. Adjust one step at a time over a few weeks while you watch the lawn.
3. Use frequent short runs. A mower that runs often removes less grass each time, which fits the one-third rule without measuring.
4. Raise the setting in shade or stress. Move up in shaded zones and during heat or drought, as Clemson advises.

Once the mower is set, check the lawn after the first week. The best mowing height for zoysia grass shows up in leaf texture and color as much as on the dial, so a lawn that looks thin or scalped needs a higher setting.

Frequently asked questions

Start with the cultivar, then set summer height to 1.5 inches unless the lawn is shaded or stressed. The best mowing height for zoysia grass is the one that keeps the lawn dense and green, with no brown stems showing after a cut. Check after each mowing and adjust one step at a time.

Sources

• Zoysiagrass Maintenance Calendar (Clemson HGIC): summer 1.5 inch height, shade and stress advice, spring and fall heights, blade sharpening.
• Foolproof Lawncare: Zoysiagrass (UF/IFAS Extension Charlotte County): cultivar heights for Cashmere and EmpireTurf.
• The One-Third Mowing Rule (LSU AgCenter): one-third guideline, weekly or three to four times monthly mowing, scalping and weeds.

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