Summer lawn care doesn’t have to be overwhelming — it just has to be timely. The right task at the right time is what separates a lawn that thrives from one that barely survives.
Whether you have warm-season grass that loves the heat or cool-season grass that’s just trying to make it to fall, this checklist breaks down exactly what to do in early, mid, and late summer.
If you’d rather hand it all off, LawnStarter can connect you with a local lawn care pro today.
| Key Takeaways |
|---|
| • Mow high all summer: Raise your mowing height at least 1/2 inch above your normal height. • Water deeply and infrequently: 1 inch per week for warm-season grass, 2 inches for cool-season grass when temps hit 85 degrees (or let it go dormant). • Most warm-season lawn tasks happen in summer; most cool-season lawn tasks wait until fall. |
Warm-Season vs. Cool-Season Grass: A Quick Reference
How do you decide the best summer lawn care? As Ron Meyer, retired agronomist with the Colorado State University Extension, puts it, “Know(ing) what kind of grass you have is the first thing.” Lawn care varies depending on whether you have warm-season or cool-season grass.
| Grass Type (Examples) | Peak Growth | Summer Priority |
| Warm-season (Bermuda, Zoysia, St. Augustine, centipede, bahia, buffalograss) | Summer | Mow, water, fertilize, treat pests |
| Cool-season (Kentucky bluegrass, tall fescue, fine fescue, perennial ryegrass) | Spring and Fall | Water, mow, avoid stress, gentle care |
See Related:
— Guide to Growing Warm-Season Grasses
— Guide to Growing Cool-Season Grasses
Early Summer Lawn Care (June)
June is go-time for warm-season lawns. For cool-season lawns, it’s about staying steady and keeping stress low as temperatures climb.
Mow High and Do It Right
Set your mower from 1-4 inches for warm-season grass and 1.5-4 inches for cool-season grass. Taller blades shade the soil, slow moisture loss, and naturally suppress weeds.
Before you fire up the mower, sharpen the blades to ensure a clean cut. “Otherwise it kind of rips the grass and looks raggedy,” says LawnStarter pro Chuck Vogt of Metro Lawns in Atlanta.
“That can be a problem, especially during the warm seasons, when that can place the turf under stress,” he says.
Stick to the one-third rule: Never remove more than 1/3 of the blade height at once. More than that, and you’re inviting pests, weeds, and disease.
One more tip worth building into your routine: Leave the clippings on the lawn. As they decompose, they return nutrients to the soil — up to 25% of your lawn’s yearly fertilizer needs — for free.
See Related: What’s the Best Height to Cut Your Grass?
Fertilize and Follow the Holiday Rule
For warm-season lawns, wait until the grass has been actively growing for about 3 weeks (you’ll see noticeable green-up). Or you can go by the old “holiday schedule” and start your fertilizer program for the year around Memorial Day. Apply a slow-release fertilizer to fuel active summer growth.
For cool-season grass, a Memorial Day fertilizer is optional since spring feeding is already winding down. Skip the 4th of July entirely. Your most important feeding of the year comes at Labor Day, which we’ll cover in the Late Summer section.
See Related: When to Fertilize Your Lawn
Get Ahead of Weeds, Pests, and Disease
Early summer is your best window to treat lawn problems before heat makes them worse — and before pesticides and herbicides become risky to apply.
Spot-treat weeds with a post-emergent herbicide while temperatures are still manageable. Avoid applying any herbicide when it’s 85 degrees or higher, right before or after rain, or right before or after mowing.
Most herbicides target broadleaf weeds, so be careful around garden beds and ornamentals.
For pests, June or July is a good time to apply a grub preventer (like imidacloprid) if you had problems last year. Water it in so it’s ready when beetle larvae hatch.
Whenever possible, spot-treat rather than broadcasting pesticides across the whole lawn.
See Related: Lawn Grubs: How and When to Kill Them
Dethatch and Aerate Your Warm-Season Lawn
If your warm-season lawn has more than 1/2 inch of thatch buildup, early summer is the best time to dethatch. Thick thatch blocks water and nutrients from reaching roots and can harbor pests and disease.
Aeration should also be on your early summer list. “A lot of properties have compacted soil, so I recommend aerating at least once a year,” says LawnStarter pro Chelsea Morris, owner of High-Class Grass in Virginia Beach.
When the soil gets compacted, it restricts the flow of water, air, and nutrients to the grass roots. For warm-season lawns, the best time to aerate is late spring to early summer (May-June) after the second mowing of the season.
Cool-season lawns: Wait until late summer or early fall to dethatch and aerate.
See Related:
— How to Tell You Have Compacted Soil
— Can You Dethatch and Aerate at the Same Time?
Overseed Thin or Patchy Areas (Warm-Season Only)
If your warm-season lawn has bare or thin spots, early summer is the right time to overseed. The warmth helps new seeds germinate and establish.
Remove the dead grass, rake the soil, spread the seeds, and rake them in. Water new growth a few times daily for the first 2 weeks, and hold off on fertilizing until it’s settled in.
See Related: How to Fix Patchy Grass
Mid-Summer Lawn Care (July)
July lawn care is focused on survival. Heat, drought, and pests all peak — your main job is keeping the grass strong and healthy.
Water Correctly
Watering is the most important thing you can do for your lawn in July. According to Meyer, warm-season grasses need about 1 inch of water per week at 85 degrees, and cool-season grasses need roughly 2 inches to avoid dormancy.
You can measure how much water the sprinkler system delivers using a tuna can. Check out this video to see how:
And, you don’t need to water every day to hit that target.
“Lawns technically only need watering 2 to 3 times a week, even in the summer,” says LawnStarter pro Scott Culala of The Lawn Cypress in Gardner, Kansas. “I just wish people knew not to overwater.”
That means skipping days but watering deeply when you do. You want moisture to penetrate 6-8 inches into the soil to promote deep roots.
Water in the early morning between 4 a.m. and 8 a.m. to limit evaporation and help more water reach the roots. Avoid evening watering: It keeps the grass wet overnight — a breeding ground for fungal diseases.
How to know when to water:
- Watch your lawn for signs it needs water: blades folding inward, a dull blue-gray color, or footprints that don’t bounce back.
- Keep an eye on the forecast, too. If you get 1 inch of rain, Meyer recommends taking about 5 days off from watering. If you get less, lay off for a few days and reassess.
See Related: How Often to Water Grass in Summer
Second Summer Fertilizer
Make a second fertilizer application around the 4th of July if your lawn needs it. That’s usually a “yes” for Bermuda, St. Augustine, and Zoysia, and optional for buffalograss (only if you want it a really dark green).
Avoid fertilizing when the grass is stressed (high heat, drought). Fertilize early morning or evening, when it’s cooler, and water it in with 1/4 to 1/2 inch of water.
Watch for Pests and Disease
July is peak season for chinch bugs, armyworms, sod webworms, and white grubs. It’s also prime time for lawn diseases like brown patch and summer patch.
If you see patches dying while the rest of the lawn looks healthy, investigate first, then treat.
“If I see some brown spots popping up, I’m like, OK, let me check for armyworms. Or let me probe the yard to see if I can find grubs right underneath it,” says LawnStarter pro Justin Stultz, owner of Wildflower Lawn Care in Hutto, Texas. “It’s nothing that we can’t figure out once we identify the problem.”
Spot-treat pests and diseases whenever possible rather than applying products across the whole lawn. Broad pesticide or fungicide applications during drought can cause more harm than good.
Leave Dormant Grass Alone and Keep the Lawn Clean
If your cool-season lawn goes brown and dormant, don’t panic. Dormancy is a survival mechanism, and most grasses can survive 4-6 weeks without water. Reduce watering to 1/2 inch every 2 to 4 weeks — just enough to keep the crowns (where the roots and shoots meet) alive.
Stop mowing dormant grass, and avoid walking on it or parking on it, as dry crowns are easily damaged.
While you’re at it, keep the lawn tidy. Remove litter, tools, and toys from the grass, as anything left too long can kill the grass beneath.
Late Summer Lawn Care (August)
August is about recovery and setting up a strong finish. Warm-season lawns get one last push. Cool-season lawns are almost out of the woods — fall is where they shine.
Fertilize Warm-Season Grass and Prime Cool-Season Lawns for Fall
Depending on where you live, mid-August to Labor Day (or 4-6 weeks before the first frost in your area) is the last window to feed your warm-season lawn with nitrogen.
A light application of slow-release fertilizer helps the lawn finish the season strong without pushing excessive growth as temperatures start to cool.
For all cool-season grasses, Labor Day marks the most important fertilization of the year. Fall feeding fuels root development and helps cool-season turf recover from summer stress before its big fall green-up. Don’t skip it.
See Related: When is the Best Time to Apply Fall Fertilizer?
Prepare Cool-Season Lawns for Their Fall Comeback
If your cool-season lawn took a beating this summer, fall overseeding is your best recovery tool.
The best time to dethatch, aerate, and overseed your cool-season lawn is late August through October, depending on where you live. Wait until temperatures drop below 75 degrees in the air (below 65 degrees in the soil) to favor seed germination and root growth.
See Related:
— 5 Clear Signs You Need to Overseed Your Lawn
— 7 Steps to Prepare Your Lawn for Aeration and Overseeding
FAQs
Geography is your first clue: Northern states typically have cool-season grass, and southern states have warm-season grass. If you’re in the transition zone, watch your lawn’s growth pattern:
• Does it grow most in summer? Warm-season.
• Does it surge in spring and fall and slow down in summer? Cool-season.
Your local Cooperative Extension service can also identify your grass type for free.
Yes, with a little planning. If you have a programmable irrigation system, set it to water early in the morning once or twice a week. Install a rain sensor to avoid overwatering. Ask a neighbor or hire a local lawn care pro to mow while you’re away.
See Related: How to Prep Your Lawn Before a Vacation
Keep Your Lawn Healthy All Summer Long
Drought, pests, weeds, disease — summer throws a lot at your lawn. But with the right tasks at the right time, you can stay ahead of it all.
Rather spend your summer at the lake instead of behind a mower? Connect with a local lawn care pro on LawnStarter and get your weekends back.
Sources
- Chelsea Morris, owner of High-Class Grass in Virginia Beach, VA. Personal interview.
- Chuck Vogt, owner of Metro Lawns in Atlanta, GA. Personal interview.
- Justin Stultz, owner of Wildflower Lawn Care in Hutto, TX. Personal interview.
- Ron Meyer, agronomist at the Colorado State University Extension in Burlington, CO. Personal interview.
- Scott Culala, owner of The Lawn Cypress in Gardner, KS. Personal interview.
Main Image: Gardener trimming bushes outside brick house. Image Credit: Pxfuel
