Zoysiagrass Lawn Care Guide for Arkansas

The Nitrogen Budget

For zoysiagrass, aim for about 2 pounds of nitrogen per 1,000 square feet across the season, and treat 3 pounds as the ceiling where the risk of excess growth and thatch rises. Split it across the active growing months rather than pushing it all at once — zoysia is a slow, dense grower, and heavy feeding late in the season does more harm than good. That cutoff matters beyond the growth chart: late-season nitrogen is one of the conditions that feeds large patch disease going into fall, so restraint here is part of disease control, not just a growth guideline.

Mowing Through the Season

Zoysiagrass holds its best density kept in the 1 to 2 inch band, and 1.5 inches is the sweet spot in spring, summer, and fall alike — low enough for a tight stand, high enough to avoid stress. Never remove more than one-third of the blade in a single cut; if it has gotten away from you, step the height down over two or three mows rather than scalping it back in one pass.

The one exception is at spring green-up, when a single low reset cut down to about 1 inch clears out last year's dormant thatch and speeds up green-up. Bag the clippings from that cut, then return to the normal height for the rest of the season — it is a once-a-year reset, not a routine practice.

Pre-Emergent and Seeding Windows

The spring pre-emergent window runs from late February to late March, centered around mid-March, timed to soil temperature climbing through 55°F. That application heads off summer annual weeds before zoysia has filled back in from dormancy — it does nothing for large patch, which is a fungal issue, not a weed.

If you're planning to seed or renovate, the window falls from late April into late June, centered around late May, once soil is reliably warming through 70°F and nights stay warm. That timing matters: it hands the new grass a full season to establish before the first fall frost. Zoysia should not be seeded in fall — a lawn seeded going into cooler weather won't have time to root in before dormancy.

On the other side of the calendar, a fall pre-emergent aimed at winter annual weeds — annual bluegrass, henbit, chickweed — goes down as soil cools back through about 70°F, typically late August into early October. That product also blocks grass seed, including any winter ryegrass overseed, so it's one or the other, not both in the same season.

Watering

Zoysia's weekly target is about ¾ inch, split into two deep soakings of about ½ inch each, watered in early morning so the lawn dries out before night — wet turf overnight is an open invitation to disease. In sustained heat, that weekly number climbs: about a quarter inch more when highs sit near the mid 80s, and up to about a half inch more when three or more days push near 90, always capped so the soil can absorb it rather than run off. Deep, infrequent watering pushes roots down; frequent shallow watering does the opposite.

Product Timing Conflicts

A few product categories interact on a clock, not an event — the rules are conditional, so plan around them before you spray or seed, not after. If you've recently applied a broadleaf herbicide, wait about 6 weeks (42 days) before seeding zoysia into the same area. If you've recently put down a crabgrass pre-emergent, that wait stretches to about 12 weeks (84 days) before seeding, since the same chemistry that blocks crabgrass will block new grass seed too. Building the seeding window around whichever product you're using — rather than the other way around — avoids wasting both the herbicide and the seed.

Large Patch: Fall's Defining Disease

Large patch is the disease that shapes fall on a zoysia lawn, and the decision window on it closes earlier than most people expect. The symptoms — circular brown or straw-colored patches with an orange-tinged advancing edge — actually show up the following spring, at green-up, which is what fools people into treating in spring when the damage is already done. The infection itself happens in fall, as soil temperatures fall to about 70 degrees and below, typically late September into early October, and a preventive fungicide only works applied in that fall window.

This is a preventive step for a lawn with a documented history of large patch — not a routine annual application. A lawn that has never shown the disease should be scouted, not sprayed. The cultural side matters more than the chemistry: late-season nitrogen, overwatering, poor drainage, and heavy thatch all feed this disease, which is exactly why the season's nitrogen budget calls for stopping well before fall. If you do spray, confirm zoysiagrass is named on the product label — the label is the law.

Gear this schedule assumes

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Rain gauge

Any $10 gauge works. You need it to hit the 0.75 in/week target above without guessing.

Soil thermometer

The seed and pre-emergent windows above are soil-temperature windows — a $15 probe beats calendar guessing.

Broadcast spreader

Needed for even fertilizer and seed rates. A basic rotary spreader covers most lawns.

Oscillating sprinkler + hose timer

Enough to water deeply and consistently if you have no in-ground system.

Smart irrigation controller

Only if you have an in-ground system — a Rachio-style controller automates the watering schedule.

None of this replaces watching the actual lawn — soil temperature, rainfall, and the grass itself will always tell you more than a calendar date. Use these windows as the framework, and let what you see on the ground make the final call.

More guides

Zoysiagrass in other states

California · Georgia · Illinois · Maryland · Missouri · North Carolina · South Carolina · Tennessee · Texas · Virginia

Other grasses in Arkansas

Bermudagrass