When summer settles in across the Carolinas, effective summer lawn care and the right summer lawn fertilizer can make all the difference in keeping your grass healthy and green. From blazing heat to surprise thunderstorms, the season throws a little bit of everything at your yard.
Whether you're dealing with sandy soils near the coast or thicker clay inland, giving your lawn the right care now can make all the difference in how it looks (and survives) through the hottest months.
Summer Lawn Care Tips
1. Mow Smarter, Not Harder
Keeping your grass trimmed during a summer in the Carolinas requires more than just cranking up the mower. The key is maintaining the right height for your grass type to avoid stress and promote healthy growth.
Recommended Mowing Heights:
- Bermuda: 0.5–1.5 inches
- Bluegrass: 2.5–3.5 inches
- Centipede: 1.5–2.0 inches
- Fescue: 2.5–3.5 inches
- St. Augustine: 2–4 inches
- Zoysia: 0.5–2 inches (based on blade type)
- Finer-Bladed Zoysias: 0.5–1.5 inches
- Wider-Bladed Zoysias: 1–2 inches
Quick Tips:
- Never remove more than one-third of the blade at once.
- If your grass gets too tall while you're away on vacation, lower it gradually over several mowings spaced 3–5 days apart.
- Leave grass clippings on the lawn to decompose naturally—they return valuable nutrients to the soil.
- Taller grass keeps the soil cooler and helps trap moisture, which is really important when temperatures start climbing past 90. Plus, it helps keep weeds from taking over.
- Shaded areas should be mowed at a higher height, which allows for less frequent mowing—about once per week. For lawns mowed at 2.5 inches, mowing every five days, or twice a week, is recommended.
2. Water Like a Pro: Deep and Not Too Often
The best way to water your lawn is to go deep but not too often:
- Shoot for 1 inch of water per week, split into 1–3 sessions depending on your grass and how much rain you’re getting.
- Water early in the morning (6–10 AM) to cut down on evaporation and avoid diseases.
- Use a sprinkler timer to water your lawn just the right amount, even if you’re away for the weekend.
- Use a rain gauge or perform a quick irrigation audit to check your output.
Train Your Grass to Thrive:
Let your lawn signal when it’s thirsty:
- Folded or curled leaves
- A dull, bluish-gray hue
- Footprints that linger
This kind of watering trains your grass to grow deeper roots, so it can handle dry spells better, and it saves water, too. Reduce foot traffic during periods of extreme heat to prevent additional stress on your lawn.
3. Boost Soil Health for Better Summer Grass Growth
Many lawns in the Carolinas grow in thin, sandy or compacted soils that challenge grass growth. To improve your lawn’s foundation, consider adding organic matter to your soil:
- Top-dress with compost
- It improves drainage, adds nutrients and helps roots grow deeper
Healthy soil is the secret to a yard that can handle whatever summer throws at it—heat, rain or dry weather.
4. Essential Summer Lawn Fertilizer Tips
Applying a summer lawn care fertilizer is one of the most important steps you can take to ensure your grass thrives during the heat. Whether you prefer granular or liquid options, a good summer lawn fertilizer supports root growth and reduces stress.
- Use a slow-release fertilizer made for warm season grasses
- Apply it in late spring or early summer
- Go easy—overdoing it can burn your grass and make it thirstier
- Avoid fertilizing cool season grasses (like fescue) during summer, as it can stress the grass and promote disease
We recommend the Lawnifi Summer Fertilizer Box for a steady, no-fuss feeding schedule that keeps your lawn looking great without over-stimulating it.
Why It Works:
- Easy hose-end application
- Fast-acting and efficient
- Promotes deep root growth and stress resilience
Always clean up fertilizer from driveways and sidewalks to prevent stormwater contamination. A deflector shield or liquid fertilizer like Lawnifi can help minimize waste and runoff.
5. Be Cautious with Weed Control
Hot temps and herbicides don’t always mix well. Blanket applications in the middle of a Carolina summer can lead to unsightly browning.
Smart Weed Control Strategies:
- Spot-treat weeds or hand-pull when possible
- Wait until fall for full-yard treatments
- Always follow product labels carefully
Summer Weed Control Products:
- Broadleaf Weed Control: SpeedZone Broadleaf Herbicide for Turf
- If you start to notice grassy weeds such as crabgrass or goosegrass, Recognition is great for St. Augustine and zoysia lawns. MSMA post-emergents are best for bermuda grass lawns. Be sure to follow product labels for any control product appropriately during application.
- Weed Control for St. Augustine & Centipede Lawns: Hi-Yield Atrazine Weed Killer
6. Aerate to Let Your Lawn Breathe
It might be time to aerate if your soil is feeling packed down (thanks to foot traffic or heavy rain). This means poking holes in the ground to help water, air and nutrients reach the roots.
- Do this once a year or so, ideally in late spring or early summer
- It’s especially helpful before the hottest part of summer kicks in
Think of it as giving your lawn a breath of fresh air. You’ll see better growth and more even watering afterward.
7. Protect Your Summer Lawn from Common Pests
Summer is prime time for pests like chinch bugs, grubs and sod webworms. If you notice anything funky, keep an eye out and act fast.
- Grubs – ruin roots, cause patches
- Chinch bugs – suck the greenness out of your grass and leave drought-like patches
- Sod webworms – feed the blades
- Mole crickets – create tunnels and damage roots
- Spittlebugs – yes, they spit foam… gross, right?
If you’re seeing weird damage and not sure what’s up, try a “tug test”—gently pull on the grass. If it lifts up easily, you’ve probably got grubs.
Chinch Bugs & Sod Webworms
Chinch Bugs:
Thrive in hot, dry conditions and especially target St. Augustine lawns. These tiny pests feed at the base of grass blades, draining sap and injecting toxins that cause browning.
- Solution: Bifenthrin (Bifen XTS)
Sod Webworms:
These caterpillars are most active at night. They feed on the blades and leave behind irregular brown patches. Look for tiny moths fluttering over your lawn at dusk as a sign of their presence.
- Solution: Spinosad (Natural Guard Spinosad)
8. Watch for Lawn Diseases
Warm, humid conditions also invite fungal diseases, especially in overwatered or poorly drained areas.
Common Summer Lawn Diseases:
Gray Leaf Spot: Appears as small, oval spots with gray centers and dark borders.
- Solution: Azoxystrobin (Heritage G).
- Watch for gray leaf spot on St. Augustine grass, especially in shaded areas. Avoid overwatering and excessive fertilizer applications, as these can worsen the problem.
Root Rot: Causes thinning and yellowing due to soggy conditions and poor drainage.
- Solution: Chemical treatments are rarely effective; however, fungicides, including Azoxystrobin (Heritage G), can help prevent this disease.
Be sure to occasionally rotate any fungicides to prevent diseases from developing resistance. Prevent problems by avoiding overwatering, improving airflow and treating promptly at the first sign of disease. Also, be cautious with nitrogen—over-fertilized lawns, especially those high in nitrogen, are more susceptible to disease, as nitrogen can help it spread.
With the right approach to summer lawn care, including regular mowing, smart watering and using a high-quality summer lawn fertilizer, you’ll set your yard up for success all season long. Don’t overlook the benefits of a tailored summer lawn care fertilizer—it’s the secret ingredient for healthy, vibrant grass through the Carolinas' hottest months.
