Centipedegrass Lawn Care Guide for Louisiana

One Light Feeding Is the Whole Year

The single most important point on this page is that centipedegrass fails from too much care, not too little. Published annual nitrogen for this grass runs 1 to 2 pounds per 1,000 square feet, and Louisiana State University's own guidance calls for about 1 pound a year — split into two half-pound doses of slow-release nitrogen — with never more than 1 pound going down in any single application. Treat roughly 2 pounds a year as the ceiling, because exceeding it is documented to cause decline or death, not just extra growth: over-fertilizing pushes the runners up above the soil surface, exposes the growing points to late-fall and winter temperature swings, and large brown dead patches show up in early spring within a few years. Texas A&M rates this grass as simply not recommended under a high-maintenance program.

In practice, one light feeding after the lawn has fully greened up is usually the entire year's nitrogen. If color fades in the heat of summer, the answer is iron, not another dose of nitrogen — that's worth saying plainly, because it's the mistake this grass punishes hardest.

Soil pH and Phosphorus

Don't lime centipedegrass toward neutral. It wants acid soil — extension services across the region place the sweet spot somewhere between pH 5.0 and 6.5 and don't fully agree on where within that range, and University of Florida guidance states outright that lime should not be applied to this grass at all. Soil-test before touching pH rather than following a general lawn recommendation.

Keep phosphorus low as well, since excess phosphorus specifically degrades centipedegrass quality. And watch thatch directly instead of assuming the usual trigger applies — this grass tolerates far less of it than a typical lawn does.

Mowing Height by Season

Keep centipedegrass in the 1 to 2 inch band year-round, with about 1.5 inches as the target through spring, summer, and fall — that height sits in the sweet spot for density without scalping. Whatever the season, never remove more than a third of the blade in a single mow; if it's gotten away from you, step the height down over two or three cuts rather than scalping it back in one pass.

The Seasonal Schedule

The spring pre-emergent window runs Jan 30 to Feb 27, centered around Feb 13, triggered by soil warming through 55°F on a rising trend — that's when summer annual weeds start to germinate, so the barrier needs to be down first. Hold off on feeding until the lawn has fully greened up; that single light feeding window runs Mar 11 to Apr 22. If you're seeding or renovating, the window runs Apr 4 to May 30, once soil is reliably warming through 70°F on a rising trend and nights stay warm — that gives a full season to establish before dormancy.

On the fall pre-emergent, lead with soil temperature and treat the calendar band as the earliest edge, not the target. The trigger is soil cooling through about 70°F on a falling trend — that's when annual bluegrass, henbit, and chickweed germinate, and the pre-emergent has to already be down when it happens. Along the Gulf Coast that crossing arrives later than it does farther north, often well into October, so applying at the early end of the Aug 28 to Oct 3 window can mean putting the barrier down while soil is still in the eighties and losing most of its residual before the weeds ever show up. A fifteen-dollar soil thermometer settles this more reliably than the calendar does. Without one, night temperatures dropping into the sixties are a usable second signal.

Watering

Aim for about 0.75 inch of water a week, split into two deep soakings of about 0.5 inch each, watered early in the morning so the lawn dries before night. In sustained heat, that weekly target rises — about a quarter inch more once highs sit near the mid-80s, and up to about a half inch more once you get three or more days near 90, capped so the soil can actually absorb it without runoff. Deep, infrequent watering pushes roots down; frequent shallow watering doesn't.

Timing Conflicts Worth Knowing

If you've recently applied a broadleaf herbicide, wait about 6 weeks (42 days) before seeding — the residual can keep grass seed from establishing. If you've recently put down a crabgrass pre-emergent, wait about 12 weeks (84 days) before seeding, since it's doing exactly what it's meant to do: stopping germination, including the seed you're trying to put down. Plan any seeding window around whichever product went down last.

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.

Centipedegrass rewards restraint more than effort. Feed it once, keep the mower low and steady, water deep and early, and let soil temperature — not the date alone — call the big moves.

More guides

Centipedegrass in other states

Alabama · Georgia · North Carolina · South Carolina · Texas

Other grasses in Louisiana

St. Augustinegrass