Summer is beautiful, but so is crabgrass, and it's thriving right now. If your lawn has been looking a little rough around the edges lately, summer weed pressure is likely the culprit. Late June marks a critical turning point: the weeds that germinated in spring are now maturing and setting seed, and new warm-season invaders are making their move. Here's what's happening in your lawn right now and what you can do about it.
Weeds are opportunists. They exploit any weakness in your turf: thin patches, compacted soil, drought stress, or scalped grass, and summer delivers all of those conditions at once. When your desirable grass slows its growth due to heat stress, weeds don't slow down with it. Many summer weeds actually thrive in the same hot, dry conditions that put your lawn on the defensive.
The result? A lawn that looked healthy in May can be overrun by August if summer weed pressure isn't addressed now.
Crabgrass is the most notorious summer annual. It germinated back in early spring when soil temperatures hit 55°F, and by late June it's well established and spreading fast. Each plant can produce up to 150,000 seeds before it dies in the fall, seeds that will sit in your soil and come back next year.
Spurge is a low-growing, mat-forming weed that loves hot pavement edges, thin turf, and bare spots. It spreads quickly and can be hard to spot until it's already taken hold.
Goosegrass looks similar to crabgrass but tends to appear later in the season and in more compacted areas: driveways, sidewalk edges, and high-traffic zones.
Broadleaf weeds like plantain and clover continue to spread through summer, especially in lawns with low nitrogen levels or irregular watering.
Post-emergent herbicide is your best friend at this stage. Pre-emergents are most effective in early spring before germination, if you missed that window, a targeted post-emergent applied now can still stop crabgrass and other summer weeds before they seed. Timing matters: treat sooner rather than later while plants are still young and actively growing.
Raise your mowing height. This is one of the simplest and most effective weed suppression strategies. Taller grass (3 to 4 inches for most cool-season varieties) shades the soil, keeping it cooler and making it harder for weed seeds to germinate. Scalping your lawn in summer is an open invitation for weeds to move in.
Learn more: How Low Should You Go? Your Southern Lawn's Ideal Mowing Height for Summer
Don't let bare spots sit. If you have thin or bare areas, weeds will fill them before your grass does. Overseeding those spots now or planning a fall renovation will close the gaps weeds are exploiting.
Note: Top Turf only seeds Tall Fescue grasses in the Fall with Aeration and Seeding.
Water deeply and infrequently. Shallow, frequent watering keeps the top inch of soil moist, ideal for weed seed germination. Watering deeply two to three times per week encourages your grass roots to go deeper, where weeds can't compete as easily.
Learn more: Watering Instructions (How Much To Water Your Lawn)
It's tempting to walk your lawn on a Saturday morning and pull weeds as you spot them, but by late June that approach does more harm than good. Most summer weeds have deep, established root systems at this point, and pulling crabgrass or spurge will likely leave the root behind, where it regrows within days. Disturbing the soil around the plant also brings buried weed seeds closer to the surface, where they germinate even faster.
Beyond being ineffective, hand-pulling is time-consuming and won't address the underlying conditions that allowed weeds to take hold in the first place. A professional treatment targets weeds at the root level with the right product, at the right rate, applied at the right time — something that's much harder to replicate with a trip to the hardware store and a pair of gloves.
See more: Why You Shouldn't Pull Weeds in Your Lawn
The weeds you're battling now are producing seeds that will cause problems in 2027. Treating aggressively this summer, maintaining a thick healthy turf, and applying a pre-emergent next March are the three steps that will dramatically reduce summer weed pressure going forward. Lawn care is always part current-season management and part long-game investment.
Summer weed pressure moves fast — and the longer you wait, the more seeds end up in your soil for next year. Top Turf's Fertilization and Weed Control Program is designed to stop weeds in their tracks, protect your turf through the heat, and set your lawn up for a strong fall. Give us a call today and let's build a plan that works for your lawn, so you can stop fighting weeds and start enjoying your yard.