When Bermuda Grass Goes Dormant in Louisiana, and When It Greens Up Again
- LSU AgCenter says warm-season grasses go dormant with sustained cooler temperatures from late fall to early spring, turning brown or off-colored.
- Lawns may start to green up in south Louisiana in late February, according to LSU.
- LSU says New Orleans-area lawns can be fertilized by late March, and warns against pushing early green-up with fertilizer.
- Dormant Bermuda has living crowns, runners and rhizomes, so a gentle check below the brown blades shows whether it’s alive.
- Overseeding with ryegrass keeps color in winter, but LSU notes repeated overseeding can thin the Bermuda over time.
By December the Bermuda lawn that looked like a golf fairway in August has turned tan from edge to edge. It’s a startling change if you’re new to warm-season grass, and it leaves many homeowners wondering whether the lawn is dead. In almost every case it’s simply dormant, doing what Bermuda does every Louisiana winter.
At TurnKey Lawn Care, year-round lawn care, including the quiet months, is part of what we provide across the metro. If you’re unsure whether your lawn is dormant or in trouble, request a free estimate and we’ll take a look.
This guide explains when Bermuda goes dormant, how to tell dormancy from real damage, what to do and avoid through winter, and how to help the lawn green up well in spring.
When Bermuda goes dormant
An LSU AgCenter home lawn article explains that warm-season grasses go dormant with sustained cooler temperatures from late fall to early spring. During dormancy, the shoots turn brown or off-colored. In the New Orleans area, that usually means the lawn fades through late fall as nights cool, and it’s typically tan by the first sustained cold snaps. The exact timing shifts from year to year with the weather, and a mild December can leave a lawn partly green longer than usual. Bermuda tends to show dormancy clearly. It’s a sun-loving grass that grows hard in heat, and when temperatures drop it shuts down rather than hanging on with a dull green color. That clean shutdown is normal and even useful. The grass stops spending energy on top growth and holds its reserves in the runners and rhizomes below, ready for spring. A tan Bermuda lawn in January is a lawn at rest, not a lawn in trouble.
Dormant or dead: how to tell
A dormant lawn and a dead lawn can look similar from the street. Up close, they’re different. Here’s how to check:
- Look at the base. Part the brown blades and look at the crowns and runners near the soil. Firm, pale or greenish tissue is alive.
- Check the runners. Scratch a runner lightly with a fingernail. Living tissue underneath is greenish or white and moist.
- Tug gently. Dormant Bermuda stays anchored by its roots and rhizomes. Grass that lifts away easily with rotted roots may have another problem.
- Compare with the calendar. An even, lawn-wide tan in winter is dormancy. Patches that turned brown in summer or early fall point to pests, disease or drought.
- Wait for spring. Dormant areas green up together as the weather warms. Areas that stay brown well after the rest of the lawn greens need a closer look.
The LSU AgCenter home lawn series explains that Bermuda spreads by both above-ground stolons and underground rhizomes. Those rhizomes are part of why it comes back so reliably after winter.
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What to do while it's dormant
A dormant lawn needs much less from you, but it isn’t a time to ignore it entirely:
- Keep leaves raked off so they don’t mat down and smother the grass underneath
- Stay off frosted grass, since walking on frozen blades can damage them
- Watch for winter weeds, which stand out clearly against a brown lawn
- Water only during extended dry spells, since dormant grass still needs some moisture
- Plan spring tasks, including a soil test before fertilizing
Winter weeds deserve attention. A brown Bermuda lawn is exactly where Poa annua and henbit are easiest to see, and where they compete most. Our posts on Poa annua in Louisiana lawns and henbit in your lawn cover how to handle them. Our page on winter lawn care for Louisiana covers the rest of the season.
What to avoid in winter
- Fertilizing dormant grass, which can’t use it and which feeds winter weeds instead
- Heavy traffic and parking on the lawn, which compacts wet winter soil
- Watering on a fixed schedule, which keeps dormant turf wetter than it needs
- Assuming a brown lawn is dead and tearing it out before spring
LSU’s fall guidance adds that excess nitrogen late in the year stimulates tender growth when the lawn should be preparing for dormancy. The same logic applies through winter.
When Bermuda greens up
An LSU AgCenter article on spring lawns notes that lawns may show signs of green-up in south Louisiana in late February. Full green-up takes longer and depends on how quickly the weather warms. The same article gives regional timing for the first fertilization, which follows green-up rather than leading it:
| Area | LSU timing for spring fertilization |
|---|---|
| New Orleans area | By late March |
| North of Baton Rouge | Early April |
| North Louisiana | Around mid-April |
LSU warns against pushing growth with fertilizer when the first green appears. Fertilizing too early feeds winter weeds and produces lush growth that’s more susceptible to late frost injury and brown patch disease.
Helping Bermuda green up well
Spring transition is a vulnerable time for a warm-season lawn. A few steps help it come back strong:
- Wait for real growth before feeding. Follow LSU’s regional timing rather than the first sign of green.
- Test the soil. A soil test tells you what the lawn needs before the first application.
- Clear debris and winter weeds. Remove anything competing with the Bermuda for light and water.
- Resume mowing at the right height. LSU recommends mowing Bermuda at 1 to 2 inches during the growing season.
- Feed on a sensible schedule. LSU recommends up to 3 pounds of nitrogen per 1,000 square feet per year for Bermuda.
Our guide to Bermuda grass care and maintenance covers the growing-season routine in more detail.
Areas that don't green up
If most of the lawn greens up in spring but some areas stay brown, dormancy isn’t the explanation for those spots. Shade is one of the most common reasons in Bermuda lawns. The LSU home lawn series notes that Bermuda prefers full sun and doesn’t grow well in partially to heavily shaded areas. Clemson Extension goes further, describing Bermuda as having very poor shade tolerance and advising against growing it under tree canopies or building overhangs. Other causes of areas that stay brown into late spring:
- Shade from trees that have grown larger over the years
- Low spots that stayed waterlogged through winter
- Compacted paths and parking areas where roots struggled
- Damage from pests or disease late the previous season
- Heavy winter weed cover that smothered the grass underneath
Check those spots with the same tug-and-look test used for dormancy. If there’s no living tissue, the area needs repair once the rest of the lawn is actively growing. In deep shade, a more shade-tolerant grass or a ground cover may be the better long-term choice.
Overseeding with ryegrass
Some homeowners overseed Bermuda with ryegrass in the fall for green color through winter. LSU’s winter overseeding article notes that overseeding typically begins in October as warm-season growth slows, at 5 to 10 pounds of pure live seed per 1,000 square feet for annual or perennial ryegrass. It also describes overseeding as typically done for looks rather than for the health of the lawn, and it flags a real drawback. Continued winter overseeding can lead to less dense warm-season turf if the cool-season grass isn’t removed early in spring. The problem is spring transition. LSU explains that as temperatures warm, the Bermuda and the ryegrass compete for water, nutrients and sunlight. To tip that competition toward the Bermuda, LSU suggests lowering the mowing height and limiting watering during warm weather to stress the ryegrass, and notes some herbicides are labeled for removing cool-season grass from Bermuda lawns. If you’d rather keep your Bermuda as dense as possible, letting it go dormant without overseeding is the simpler path. Our page on fall lawn care and overseeding covers both approaches.
Bermuda compared with other lawn grasses in winter
All warm-season grasses go dormant in Louisiana winters, as LSU notes, though how brown they turn and how early varies with the grass, the site and the weather. A sheltered, sunny corner often holds color longer than an exposed lawn beside the street. Whatever your grass, the approach is similar: let it rest, keep weeds in check and wait for spring before feeding. Our page on when to stop mowing in the fall covers winding down the mowing schedule.
Frequently asked questions
When does Bermuda grass go dormant in Louisiana?
LSU AgCenter says warm-season grasses go dormant with sustained cooler temperatures from late fall to early spring. In the New Orleans area, Bermuda usually fades through late fall and is typically tan by the first sustained cold snaps.
How can you tell if Bermuda grass is dormant?
Part the brown blades and check the crowns and runners near the soil. Firm, pale or greenish tissue that stays anchored means the grass is alive and dormant, while an even, lawn-wide tan in winter is the typical pattern.
When does Bermuda grass turn green again?
LSU AgCenter notes lawns may start to green up in south Louisiana in late February, with fuller green-up as spring warms. In the New Orleans area, LSU suggests fertilizing by late March, after growth has started.
Will my Bermuda grass come back after winter?
Almost always, if it was healthy going into winter. Bermuda spreads by rhizomes and stolons, which carry it through dormancy, and it greens up as temperatures rise.
Should I fertilize dormant Bermuda grass?
No. Dormant grass can’t use it, and LSU AgCenter warns that pushing early growth with fertilizer feeds winter weeds and invites frost injury and brown patch. Wait until the lawn is actively growing in spring.
Why is part of my Bermuda lawn not greening up?
Areas that stay brown after the rest of the lawn greens up usually have another problem, most often shade. LSU AgCenter notes Bermuda doesn’t grow well in partially to heavily shaded areas, and waterlogged or compacted spots can also fail to recover.
Get the lawn ready for spring
If you’re not sure whether your lawn is dormant or damaged, tell us what you’re seeing. We’ll check it, plan the spring green-up and give you a free estimate before any work starts, with the price agreed up front. Dormant lawns rarely need much, and we’ll tell you if yours doesn’t.
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