When to cut Bermuda grass short after winter

The short answer

Cut Bermuda grass short once in early spring, after the risk of frost has passed and just as the lawn starts to green. Around Tulsa, the National Weather Service puts the average last 32-degree night on March 29, so the first short cut usually belongs right around or after that date, timed to the green shoots rather than the calendar.

This first low cut is called scalping. It strips off the brown, dormant leaves from last year so sunlight reaches the soil, and the lawn greens up faster. It's optional, it's a one-time job, and the clippings should be bagged.

Why people scalp Bermuda in spring

A dormant Bermuda lawn carries a layer of dead leaf blades through winter. In spring that layer shades the new shoots and keeps the soil cool.

New Mexico State University's mowing guide explains what removing it does: taking off 50 to 75 percent of the dead tissue, with a very low mower setting or a verticutter, opens the canopy and lets sunlight reach the soil. That warms the top of the root zone, and new growth comes from the crowns faster than it does under the old leaves. The guide's photo shows a scalped strip of Bermuda greening ahead of the unscalped grass beside it.

The University of Arkansas Bermudagrass calendar gives the same reasons in plainer terms: a slightly shorter first cut removes dead blades and debris, reduces shading of the emerging plants, and warms the soil sooner.

Bermuda can take this treatment because of how it spreads. Mississippi State University's turf specialist notes that Bermuda and zoysia can be cut very low because they have a strong network of rhizomes, underground stems that rebuild the lawn quickly once soil and air are warm enough. Centipede and St. Augustine lawns can be cut a little lower than normal in spring but should not be scalped, because they only have above-ground runners to regrow from.

Getting the timing right

The sources agree on early spring and differ a little on the exact moment:

• The University of Tennessee says to scalp in early spring when the risk of frost has passed.
• Mississippi State says to do it once, when the lawn begins its initial spring growth.
• Arkansas puts the short cut before Bermuda begins to grow in spring.

In practice, that's a narrow window: the lawn is waking up, but the new green is still low. Cut too early and you expose the crowns to cold. Tulsa's last frost dates show why that matters. The average last 28-degree hard freeze is March 17 and the average last 32-degree night is March 29, but Tulsa has recorded a 32-degree night as late as May 2 (1909). Check the 10-day forecast before you drop the deck.

Soil temperature is the other clue. The Oklahoma Mesonet posts a 3-day average soil temperature map at 4 inches deep for its stations around the state, updated every morning between 7 and 8. Our guide on when Bermuda goes dormant covers the soil temperature that wakes it up.

How low to cut

There's no single number, because Bermuda lawns are mowed at different heights all year. Oklahoma State University's Bermudagrass calendar lists a 1-inch cut in March for its high-maintenance, short-mowed schedule, then 1.5 inches from April on. Its higher-cut schedule starts at 1.5 to 2 inches.

New Mexico State's target, removing 50 to 75 percent of the dead growth, is a better guide for a lawn of any height. Lower the mower a notch or two below your normal setting and stop once you're into green tissue.

Then return to normal heights. Tennessee's spring guideline for Bermuda lawns is about 1.5 to 2 inches, rising to 2 to 3.5 inches in summer. Arkansas puts hybrid Bermuda at 0.5 to 1.5 inches and common Bermuda at 1.5 to 2.5 inches. From here on, follow the one-third rule: never take more than a third of the blade in one mowing.

Three things that go wrong

Leaving the clippings. Scalping produces a lot of dead material. Tennessee says to bag it so it doesn't smother the new growth, and Mississippi State suggests composting it.

Weeds. Opening the canopy lets sun reach the soil, and Tennessee warns that this can raise weed pressure. Oklahoma State's calendar puts the first preemergent crabgrass application between January 1 and March 5, before scalping season.

Scalping sick or uneven turf. New Mexico State warns that scalping during stress can damage or kill turf, and weeds can move in while it recovers. If large circles or arcs of bleached, dead grass appear as the lawn greens, Oklahoma State says that's likely spring dead spot, and you should not dethatch or core aerate while the disease is active because it spreads the fungus. On a bumpy lawn, a low deck will gouge the high spots; Arkansas notes uneven lawns may need higher mowing heights to avoid that.

Hold the fertilizer

A freshly scalped lawn looks hungry, but early nitrogen works against it. Oklahoma State's horticulture tips for early April 2026 say not to fertilize warm-season grass yet, even if it's showing some green, and to wait until early May when the turf is fully green and growing. The University of Georgia adds that fertilizing too early can push grass out of dormancy without the stored energy to handle a late cold snap.

Common questions

Do I have to scalp my Bermuda lawn?

No. The University of Tennessee says scalping can speed green-up and help with thatch, but it isn't necessary for every lawn and it carries risks, including more weeds. A lawn left alone still greens up, just more slowly.

What month should I scalp Bermuda in Oklahoma?

Early spring, once the frost risk has passed and the lawn starts to green. Tulsa's average last frost is March 29, and Oklahoma State's calendar lists its shortest cut for March. Watch the forecast, since frost has come as late as May 2.

How short should I scalp Bermuda grass?

Low enough to remove 50 to 75 percent of the dead, brown growth, according to New Mexico State. Oklahoma State's short-mowed schedule uses 1 inch in March. Then raise the mower back to your normal height.

Should I bag the clippings when I scalp?

Yes. Tennessee advises bagging so the dead material doesn't smother new shoots. Mississippi State suggests composting the clippings instead of sending them to the landfill.

Can I scalp St. Augustine or centipede grass?

No. Mississippi State says those grasses spread only by above-ground runners, so they can be cut slightly lower than normal in spring but shouldn't be scalped.

Help with the lawn

Our lawn care plans cover mowing, edging, bed care, mulch and seasonal cleanup in Jenks, Bixby, Glenpool, Sand Springs and Sapulpa. Send us a few photos and we'll put the work and the price in writing.

Sources: National Weather Service Tulsa, frost and freeze climatology · New Mexico State University, Mowing Your Lawn (Guide H-505, PDF) · University of Arkansas Extension, Lawn Care Calendar: Bermudagrass (FSA6121, PDF) · Mississippi State University Extension, First Early Spring Mowing (2012) · Mississippi State University Extension, Scalping Turf: First Seasonal Mowing (2009) · University of Tennessee Extension, Lawrence County Turf Memo: Spring FAQ 2025 (PDF) · Oklahoma State University Extension, Bermudagrass Lawn Management Calendar (L-441, PDF) · Oklahoma State University Extension, Spring Dead Spot of Bermudagrass · Oklahoma State University Extension, Early to Mid April 2026 Hort Tips · University of Georgia Extension, Help warm-season turfgrasses green-up · Oklahoma Mesonet, 3-day average 4-inch soil temperature