How to Keep Your Lawn Healthy During a DMV Heat Wave

If you’ve stepped outside lately, you’ve probably noticed one thing: it’s HOT.

Summer in the DMV can be brutal on our lawns. Between weeks of high temperatures, intense sunshine, and the occasional stretch without meaningful rain, it’s easy for your grass to go from lush and green to dry and stressed. The good news? A few simple habits can help your lawn survive the heat and bounce back beautifully when cooler weather returns.

Water Smarter, Not More

It may be tempting to run the sprinklers every evening, but timing matters just as much as how much you water.

The best time to water is early in the morning, ideally between 5 a.m. and 9 a.m. This gives the water time to soak into the soil before the afternoon sun causes it to evaporate. It also allows the grass blades to dry throughout the day, which helps reduce the chance of fungus and disease.

Aim for about one inch of water per week, including rainfall. Deep, infrequent watering encourages roots to grow deeper, making your lawn more resilient during future heat waves.

Raise Your Mower Blade

If you’ve been cutting your grass extra short to avoid mowing as often, it can actually do more harm than good.

Longer grass provides natural shade for the soil, helping it retain moisture and keeping roots cooler. During the hottest parts of the summer, raising your mower blade by an inch can make a noticeable difference.

As an added bonus, longer grass also helps crowd out weeds.

Don’t Stress About Brown Spots

Seeing patches of brown can be alarming, but it doesn’t always mean your lawn is dying.

Many cool-season grasses common in Maryland, DC, and Northern Virginia naturally go dormant during periods of extreme heat and drought. Dormant grass may look brown, but it’s often simply conserving energy until temperatures cool and rainfall returns.

Continue giving it the occasional deep watering, and resist the urge to over-fertilize or overwater in an attempt to “fix” it.

Hold Off on Fertilizing

Summer is generally not the best time to fertilize cool-season lawns.

Applying fertilizer during extreme heat can actually place additional stress on already struggling grass. Instead, save your major feeding for late summer or early fall, when temperatures begin to cool and your lawn enters its peak growing season.

Keep an Eye Out for Summer Pests

Heat and drought can also invite unwanted visitors.

Watch for signs of grubs, chinch bugs, or other lawn pests, especially if sections of your lawn begin dying in irregular patches. If the turf pulls up easily like a loose carpet, grubs could be the culprit.

Catching problems early is much easier (and less expensive) than replacing an entire lawn later.

Remember: Your Lawn Doesn’t Have to Be Perfect

It’s easy to compare your yard to the perfectly green lawns you see online, but remember that every property is experiencing the same weather.

A healthy lawn isn’t necessarily one that’s bright green every day of the summer. It’s one that’s cared for consistently and given the best chance to recover once temperatures become more manageable.

Just like every other part of your home, a little preventative maintenance goes a long way. Your lawn plays a big role in your home’s curb appeal, and taking care of it helps protect one of your biggest investments. With a little patience (and hopefully a break from these heat waves soon!), your yard will be ready to thrive again this fall.