Lawn Care Calendar for Warm-Season Grass

Key takeaways
• Peak season is late spring to early summer: Warm-season grass greens up once temperatures stay in the 60s and grows fastest in 85-to-95-degree heat. • Time tasks to the season: Dethatch and aerate in late spring or early summer, fertilize from late spring to early summer, and overseed with annual ryegrass in fall for winter color. • Winter care depends on your region: Deep South lawns still need occasional watering, weed control, and mowing, while transition-zone lawns go dormant and need almost none.

Key takeaways

• Peak season is late spring to early summer: Warm-season grass greens up once temperatures stay in the 60s and grows fastest in 85-to-95-degree heat.
• Time tasks to the season: Dethatch and aerate in late spring or early summer, fertilize from late spring to early summer, and overseed with annual ryegrass in fall for winter color.
• Winter care depends on your region: Deep South lawns still need occasional watering, weed control, and mowing, while transition-zone lawns go dormant and need almost none.

Lawn Care Calendar for Warm-Season Grass

This warm-season grass lawn care calendar shows which lawn tasks to tackle each season, from spring green-up through winter dormancy. Warm-season grasses grow most in summer, so their care is most intense from late spring into early fall.

Deep South lawns need attention through winter, while transition-zone lawns go dormant and rest. The infographic below sums up the year, and the guide breaks down each task.

Warm-season grass includes bahiagrass, Bermudagrass, buffalograss, carpetgrass, centipedegrass, St. Augustinegrass, and Zoysiagrass. If you don’t have warm-season grass, check out our cool-season grass lawn care calendar. When the seasonal to-do list feels like a lot, Lawn Love’s lawn care service can take it off your plate.

In this article:

Season	Temperature trigger	Top priority tasks
Spring (Mar-May)	Grass greens up once temperatures stay in the 60s	Clean up, dethatch, aerate, pre-emergent weed control, overseed, fertilize
Summer (Jun-Aug)	Fastest growth at 85 to 95 degrees	Mow high often, water 1 inch weekly, early-summer fertilizing, pest control
Fall (Sep-Nov)	Grass slows and goes dormant near 50 to 55 degrees	Last fertilizing by early September, overseed for winter color, leaf cleanup, winterize
Winter (Dec-Feb)	Dormant in most areas; active in the Deep South	Light watering, spot weed control, mow only if it grows

Spring warm-season lawn care: March, April, May

Spring lawn care begins once temperatures consistently reach the 60s and the grass starts growing again. Warm-season turf begins spring green-up once soil temperatures reach 65 degrees, though exact timing varies by region.

Clean up the yard
Buy lawn care supplies
Repair and maintain the mower and equipment
Check the irrigation system
Test the soil and add amendments
Apply fungicides
Dethatch
Aerate
Control weeds
Overseed or lay sod
Fertilize
Add topdressing
Mow
Control pests

Map of the United States showing cool-season grass, warm-season grass, and transition zones. Photo Credit: Infographic by Juan Rodriguez

In the northern half of the transition zone (where certain Zoysia and Bermuda varieties grow), warm temperatures can come as late as May, in states such as Delaware and West Virginia.
In the furthest reaches of the South (like the Florida Keys), it may never get cold enough to force dormancy.

Clean up the yard

Rake or blow away leaves and debris that piled up over winter. If you still have snow, don’t walk on your lawn; spread it evenly with a rake so it melts faster.

Buy lawn care supplies

In areas with early-spring snow, it’s a good time to stock up on fertilizer, weed killers, and soil amendments.

Repair and maintain the mower and lawn care equipment

illustration depicting the grass cut with a sharp blade vs a dull blade Photo Credit: Infographic by Juan Rodriguez

Get your equipment ready before the spring rush:

Sharpen mower blades and cutting tools
Perform a lawn mower tune-up
Repair broken equipment
Clean your mower
Replace string trimmer line
Get fresh gas or new batteries

Check the irrigation system

Inspect your irrigation system before use, and only turn sprinklers on once all threats of hard freezes have passed. In warmer climates, check your sprinklers at least once a year.

Test the soil and add amendments

A spring soil test reveals pH and nutrient gaps before the growing season. If it shows deficiencies, you’ll likely need fertilizer (more on that below).

Apply fungicides

Cool, rainy spring weather is perfect for fungal lawn diseases. Common warm-season diseases include:

Dollar spot
Fairy ring
Large patch
Leaf spot and melting out
Spring dead spot
Turfgrass rust (commonly affects Zoysiagrass)

Apply a fungicide if disease appears.

Dethatch

Illustration comparing healthy grass and unhealthy grass, showing thick thatch layer above soil on unhealthy side and dense roots on healthy side. Photo Credit: Infographic by Juan Rodriguez

Dethatching removes excess thatch and is invasive, so wait until late spring (May), when warm-season grass is actively growing and can recover.

Aerate

Aeration loosens compacted soil. It helps most on clay soils (common across the South and East except Florida) and high-traffic lawns.

Control weeds

Spring is prime weed season: Stop summer annuals with pre-emergents while handling lingering winter annuals, especially if you want to prevent crabgrass.

Apply pre-emergent herbicides before soil temperatures reach 55 degrees, or as early as February in warm areas. Skip weed and feed when targeting winter annuals, since the timing rarely lines up.

Repair patches if necessary.

“For warm-season grasses such as bermudagrass, overseeding an established stand with another warm-season grass is not a common practice, because these grasses can spread vegetatively and naturally fill thin or damaged areas during active growth,” says Manuel Roman S. Chavarria Sanchez, assistant professor of Turfgrass Stress Physiology at Texas A&M University.

If your turf is not performing well, he says to evaluate soil compaction, irrigation and mowing routines, water quality, fertility, shade, drainage, traffic, and pest problems before overseeding.

The best time to overseed your warm-season grass is late spring and summer. Warm-season grass seed sprouts best when the soil temperature is around 65 to 75 degrees (80 degrees in air temperature).

You can also lay down sod instead. While you can lay sod as long as the temperatures aren’t freezing, late spring is one of the better times to lay down warm-season sod.

Fertilize

Warm-season grass needs nitrogen, phosphorus, and potassium (N-P-K). Fertilize when it’s actively growing, ideally late spring to early summer. A soil test tells you the right ratio, but a balanced fertilizer is a safe choice.

Add topdressing

If your lawn still struggles, topdress your lawn with a thin layer of organic material in late spring.

Mow

Landscape — If you live in cooler-parts of the country, the first mow of the season will be in May. Further south you can mow as early as March. Photo Credit: Pxhere

Your first mow depends on location:

Transition-zone homeowners usually mow by the end of May.
Those further south may mow as early as March.
Far enough south, you may never stop mowing in winter.

Mow only once the grass shows real growth, follow the one-third rule, and never scalp. You likely won’t mow more than once a week until summer.

Control pests

Spring wakes up lawn pests. If an infestation gets severe, treat it with pesticides.

Summer warm-season lawn care: June, July, August

Summer is peak growing season, with warm-season grasses thriving in 85 to 95 degrees, so you’ll mow more often. In the South, work in the cooler morning or evening, stay hydrated, and watch for heat; transition-zone summers are milder but still call for care.

Mow high
Water the lawn
Fertilize
Apply fungicides
Dethatch
Aerate
Control weeds
Overseed or lay sod
Control grubs and pests

Mow high

Man mowing lawn with a lawnmower — To protect your warm-season grass from summer heat and drought, mow a little higher. Photo Credit: aboutmomentsimages | Adobe Stock

A higher mowing height encourages grass roots to grow deeper, and a deeper root system is more tolerant of stressors like drought. Mow most warm-season grasses down to 2 inches (taller for non-dwarf St. Augustine).

Keep mower blades sharp for all grass types, but especially for St. Augustine.

“Don’t even go near your St. Augustine lawn unless your mower blades are razor sharp,” says Justin Stultz, owner of Wildflower Lawn Care, in Hutto, Texas. “The wider, leafier grass blades will look very frayed if you don’t maintain your mower well.”

Consider grasscycling, leaving clippings to retain moisture, with a mulching mower; switch to a side-discharge mower for wet grass. In dry regions, you may need to stop mowing if drought pushes your lawn into dormancy.

Water the lawn

Give warm-season grass 1 inch of water per week in long sessions, and skip irrigation after rain. Water early in the morning to limit evaporation and scalding.

In areas with water restrictions, adapt the schedule.

“Sometimes we talk about soaking it in the morning, right before the sun comes up, and making sure you get one more really good watering in around 3 p.m.,” Schultz says.

“Or, if it’s super hot in the summer, you probably want to do it a little bit later,” he says, ”but just make sure you’re giving the yard enough time to dry off before nighttime, so you don’t get any mold or fungus.”

Your second option is to let it go dormant.

“It’s a normal, natural process,” Schultz says.

Fertilize

Actively growing grass needs nutrients, so fertilize in early summer (June) before peak heat. Fertilizing during July heat stress or over-applying can burn the lawn, so use a slow-release product.