Tuscaloosa is an awkward place to look up lawn advice. Half the guides you find are written for the Gulf Coast and half are written for Tennessee, and Tuscaloosa sits squarely between them. On the 2023 USDA Plant Hardiness Zone Map the city is split: the 35401 ZIP falls in Zone 8b, while 35406 to the north is 8a. That line runs through town, and it is a decent metaphor for how turf recommendations work here.
This calendar leans on the Alabama Cooperative Extension System — Auburn’s extension service, the closest thing we have to a local authority — plus NOAA climate normals for the Tuscaloosa Municipal Airport station. Where Extension only publishes guidance for “south Alabama,” that is noted, because Tuscaloosa is not south Alabama.
The climate you are actually working with
Two numbers shape almost everything below.
The first is frost. Using NOAA’s 1991 to 2020 normals for Tuscaloosa Municipal Airport, the 50 percent probability date for the last spring freeze is March 24, and the first fall freeze is November 10. Those are coin-flip dates, not guarantees. The Alabama State Climatologist’s office notes that the latest recorded last freeze at this station was April 21, back in 1953.
The second is rainfall, and it is the one most people get wrong. Tuscaloosa averages 52.60 inches a year, which sounds like plenty. But look at the distribution:
| Month | Normal precipitation (in.) |
|---|---|
| Jan | 5.35 |
| Feb | 5.32 |
| Mar | 4.54 |
| Apr | 4.21 |
| May | 3.98 |
| Jun | 4.77 |
| Jul | 4.40 |
| Aug | 3.30 |
| Sep | 3.52 |
| Oct | 3.51 |
August, September and October are the three driest months of the year. That is precisely when warm-season grass is still actively growing and when irrigation demand peaks. The wettest months are November through February, when the lawn is dormant and does not care.
January and February
Nothing is growing. This is planning season.
Get a soil test done now, before the spring rush. Alabama Extension routes samples through the Auburn University Soil, Forage and Water Testing Laboratory. A routine analysis covers pH, phosphorus, potassium, magnesium and calcium. For an established lawn, sample the top 2 to 3 inches and composite subsamples from at least ten spots. The published fee was $10 per sample as of the 2022 schedule — confirm current pricing with the lab before you mail anything. The Tuscaloosa County Extension Office at 1800 McFarland Blvd E is the local contact point.
If lime is called for, this is the window to apply it. Coastal Plain soils across most of Tuscaloosa County run acidic, typically below pH 6.0, and lime takes months to move.
February is also the backup window for pre-emergent herbicide. Extension’s guidance: “Apply preemergent herbicides if forgotten in September and if spring weeds were a concern last year.” The primary window was last fall.
March
Average last freeze is March 24. Growth begins but is not reliable yet.
If you are going to scalp — dropping the mower deck progressively to remove dead top growth before green-up — Extension describes the approach as lowering the deck one notch a month and bagging clippings, aiming to be at your lowest setting by the time the grass wakes up.
Do not fertilize yet. Extension is explicit that fertilizing warm-season turf too early in spring reduces root mass.
April
Green-up month. Extension’s April calendar says to start a mowing routine as spring growth begins and to fertilize warm-season lawns after they are fully green — not at the first hint of color.
Also in April:
- Check thatch on bermuda and zoysia. Extension’s April calendar sets the dethatching threshold at half an inch and says to wait for active growth. (Their Home Lawn Maintenance page uses one inch. Pick a threshold and know which one you are following.)
- Watch for fungal disease in cool, wet weather.
- Do not spray post-emergent herbicide during spring transition. Extension’s chemical weed control guide says plainly: do not apply during green-up, when the lawn is emerging from dormancy and least able to take the hit.
May and June
The lawn is growing hard. This is when it wants nitrogen.
Never apply more than one pound of nitrogen per 1,000 square feet in a single application. Annual totals from Extension’s Home Lawn Maintenance table, in pounds of N per 1,000 square feet per year (standard / maximum):
| Grass | Standard | Maximum |
|---|---|---|
| Bermudagrass | 3 | 5 |
| Zoysiagrass | 2 | 3 |
| St. Augustinegrass | 2 | 4 |
| Centipedegrass | 1 | 2 |
Centipede is the one people ruin. Too much nitrogen actively suppresses it.
May through June is also the peak hatch window for mole crickets — Extension puts it at early May to mid-June — and treatments aimed at young nymphs in June, July and early August work far better than anything applied later.
July and August
Heat. July normals for Tuscaloosa are a 92.1 degree high and a 71.3 degree low. Overnight lows above 70 mean the turf never really cools off and recovers.
Water deeply and infrequently. Extension’s guidance is to apply half an inch to one inch per application, enough to wet the soil 4 to 6 inches down, and to never water daily except during establishment. Frequent shallow watering builds shallow roots. Water early in the morning to limit evaporation loss. To calibrate, set a few empty tuna cans around the zone and time how long your system takes to fill them.
Then there are armyworms. Extension notes that in most years, reports of fall armyworms on turf start in late July or early August. Well-fertilized bermuda is their favorite target. Scout with a soap flush — two tablespoons of dish soap in a gallon of water poured over a square foot or two — and treat while the caterpillars are under half an inch long. Extension maintains a county-by-county armyworm tracker that is worth bookmarking from July onward.
September and October
The most important month of the year for weed control is September, and almost nobody treats it that way.
Extension’s fall guidance is to apply pre-emergent for winter and spring weeds in mid-September or early October. This is what stops annual bluegrass, henbit and chickweed from taking over in February. Note that Alabama Extension gives calendar dates, not soil temperature thresholds — the widely repeated “55 degree soil temperature” rule comes from UGA Extension, not Auburn.
Early fall is also a reasonable core aeration window, though Extension contradicts itself here: Home Lawn Maintenance says summer, Fall and Winter Lawn Care says early fall, the south Alabama calendar says April. The safe underlying principle is to aerate while the grass is actively growing and has time to recover.
If you overseed dormant bermuda with perennial ryegrass, September and October is the window, at 8 to 12 pounds per 1,000 square feet. Perennial ryegrass beats annual for texture, color and disease tolerance. Know going in that you will be fighting it back out again in late spring.
Large patch fungicide, if you have a history of it, goes down in early fall before dormancy.
November and December
Growth stops. The lawn goes off-color and that is normal.
Wild garlic and wild onion are best treated now — Extension’s window is November or December, then again in February.
Keep leaves off the turf, apply lime if your soil test called for it, and resist the urge to fertilize. Late-fall nitrogen on warm-season grass increases the risk of winter injury.
The short version
If you do only four things a year in Tuscaloosa: soil test in winter, fertilize after full green-up in April, water deep and infrequent through the August-to-October dry stretch, and put down pre-emergent in mid-September. That sequence prevents more problems than everything else on this page combined.