Zoysiagrass Lawn Care Schedule for Texas

Nitrogen Budget

For zoysiagrass, aim for about 2 lbs of nitrogen per 1,000 sq ft across the season, and treat 3 lbs as the ceiling — going past that point raises the risk of excess growth, thatch buildup, and stress without added benefit. Split applications across the growing season rather than pushing it all in at once, and match the rate on the bag to your actual square footage.

Mowing Height Through the Seasons

Keep zoysiagrass in the 1" to 2" range through spring, summer, and fall, with about 1½" as the sweet spot for density without scalping. In spring, a single low reset cut down to about 1" can clear last year's dormant thatch and speed green-up — but only do this once. Bag the clippings from that cut, then return to your normal height.

Whatever the season, never remove more than one-third of the blade in a single mow. If the lawn has gotten away from you, step the height down gradually over two or three cuts rather than scalping it in one pass.

The Seasonal Schedule

Pre-emergent herbicide goes down as soil rises to 55°F, in the window from Feb 12 to Mar 12 — this gets ahead of summer annual weeds before the lawn fills in. Spring green-up fertilizer follows once soil holds consistently above 65°F and the lawn shows about half its green-up, generally Mar 20 to Apr 17.

If you're renovating or filling in bare patches, the seeding window for warm-season grass runs Apr 17 to Jun 12, once soil is reliably in the 65–70°F range and nights stay warm. This gives the grass a full growing season to establish before dormancy — warm-season grass should not be seeded in fall.

Aeration fits in late spring, Apr 16 to May 28, once the lawn is actively growing with soil above 65°F and strong green-up. A summer fertilizer application follows during peak growth, May 17 to Jun 28. If grub damage has been a known issue on your lawn or in your area, the early-summer window (May 3 to Jun 14) is when a preventive treatment needs to go down and be watered in — before eggs hatch into root-feeding larvae. Most lawns can skip this and simply scout for damage instead.

Broadleaf weeds are best treated once the lawn has fully greened up and weeds are actively growing, in the Apr 23 to Jun 10 window — always confirm the label lists your grass type, and avoid spraying above roughly 90°F or under drought stress. A wetting agent applied May 8 to Jul 7 can help water soak in rather than run off during the hottest stretch.

In early fall, a high-potassium, low-nitrogen application (Sep 14 to Oct 26) helps the lawn harden off before dormancy. As soil cools through about 70°F in the Aug 28 to Oct 3 window, a fall pre-emergent stops winter annual weeds like annual bluegrass, henbit, and chickweed before they germinate — but it will also block grass seed, including any winter ryegrass overseed, so plan for one or the other, not both. An annual soil test between Jul 27 and Oct 25 gives the clearest read on what the lawn actually needs going into the next season.

Watering

Aim for about ¾" of water a week, split into two deep soakings of about ½" each, watered early in the morning so the lawn dries out before night — wet turf overnight invites disease. In sustained heat, that weekly target can rise by about a quarter inch when highs sit near the mid-80s, up to about a half inch when three or more days push near 90, capped so the soil can absorb it without runoff. Water deep and infrequently rather than little and often, so roots are encouraged to grow down.

Timing Conflicts to Watch

If you've recently applied a broadleaf herbicide, wait about six weeks (42 days) before seeding — the herbicide can interfere with germination if seed goes down too soon after. If you've recently applied a crabgrass pre-emergent, wait about twelve weeks (84 days) before seeding, since that product is designed to stop grass seeds — including the one you'd be putting down — from germinating. Plan seeding windows around whichever product you've used most recently, and always check the specific label for its own restrictions.

Gear this schedule assumes

These are affiliate links: Tiller earns a small commission at no cost to you. We only list gear the schedule above already assumes you have — no sponsored picks. Full disclosure.

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 the label on the product in your hand — confirm rates, grass-type restrictions, and safety guidance there before applying anything. Used together, though, a steady mowing height, a paced nitrogen budget, and attention to these seasonal windows go a long way toward a zoysiagrass lawn that holds up through a Texas summer.

More guides

Zoysiagrass in other states

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

Other grasses in Texas

Bermudagrass · Centipedegrass · St. Augustinegrass · Tall Fescue