If you’re asking, "how do I get rid of crabgrass in the summer?", you’re not alone — especially in Denver. Our hot summers, sudden weather changes, and stressed lawns create the perfect environment for crabgrass to thrive.
The good news? With the right steps and timing, you can get rid of it and protect your lawn. Here’s exactly how.
How to Identify Crabgrass
Spotting crabgrass early makes control easier. Look for:
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Light green, sprawling patches
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Wide, coarse blades spreading outward from a center point
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Growth in bare, sun-exposed areas
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Star-like shape close to the ground
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Tiny finger-like seed heads during summer
Unlike dandelions or other weeds, crabgrass spreads aggressively across lawns, forming thick patches if left unchecked.
How Do I Get Rid of Crabgrass in the Summer? 9 Proven Solutions
1. Apply Pre-Emergent Herbicide
Stop crabgrass before it starts. Apply a pre-emergent herbicide with prodiamine or pendimethalin in early spring, around April–May, when soil temps reach 55°F. Water lightly after application.
2. Pull It by Hand
For small areas, hand-pulling works well. Water the area first to loosen the soil, then pull the entire plant, roots and all.
3. Use a Selective Weed Killer
When crabgrass takes hold, apply a post-emergent herbicide containing quinclorac or fenoxaprop. Spray during early summer when crabgrass is actively growing. Follow label instructions carefully.
4. Build a Healthier Lawn
Strong lawns naturally resist weeds. Mow cool-season grasses like fescue and bluegrass at 2.5–3 inches, fertilize regularly, and water deeply to encourage thick growth.
5. Treat with Boiling Water
In garden beds, sidewalk cracks, or edges, pour boiling water directly on crabgrass. Be careful — it kills all plants it touches.
6. Overseed in Fall
Fill in bare spots by overseeding in late summer or early fall. Choose drought-tolerant grasses suited to Denver’s climate and aerate before seeding for better results.
7. Aerate Your Lawn
Annual core aeration improves soil structure, boosts lawn health, and makes it harder for crabgrass to spread. Fall is the ideal time in Denver.
8. Water the Right Way
Deep, infrequent watering (1–1.5 inches once or twice a week) encourages strong roots. Water early mornings to reduce evaporation and disease.
9. Mulch and Cover Bare Areas
Apply mulch (2–3 inches) in garden beds to block sunlight and prevent crabgrass. For paths, use landscape fabric under rock or wood mulch for lasting protection.
Common Mistakes to Avoid
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Skipping pre-emergent treatment: Timing is everything.
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Overusing herbicides: Can stress your lawn and lead to more weed issues.
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Mowing too short: Weakens grass and encourages crabgrass.
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Frequent, shallow watering: Promotes weak roots and weed growth.
Strong, healthy lawns make it much harder for crabgrass to invade.
Still Wondering How Do I Get Rid of Crabgrass in the Summer? Let Mile High Lifescape Help
If you’re tired of battling weeds every summer, Mile High Lifescape is here for you. Our expert Denver lawn services include:
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Professional pre- and post-emergent treatments
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Lawn aeration and overseeding
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Full fertilization and weed control programs
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Custom lawn care plans for Colorado’s unique climate
Contact Mile High Lifescape today for a free consultation and take control of your lawn this season!
🌏 Contact Us
Mile High Lifescape
Address: 1007 S Federal Blvd, Denver, CO 80219, US
Phone: 1-303-877-9091
Website: https://milehighlifescape.com/
Email: hello@milehighlifescape.com
Google Maps: https://www.google.com/maps?cid=8131554802714482277
Conclusion
When it comes to how do I get rid of crabgrass in the summer, prevention and persistence are key. Early treatments, strong lawn practices, and quick action against outbreaks give your lawn the best chance to stay lush and healthy.
Trust Mile High Lifescape’s Denver experts to help you build a greener, weed-free yard — so you can enjoy your summer without the stress of crabgrass.
FAQs
How do I get rid of crabgrass in the summer without harming my grass?
Use selective herbicides like quinclorac. For small patches, hand-pulling after watering works too.
What do professionals use to control crabgrass?
Pros use selective herbicides plus lawn care strategies like aeration and overseeding for lasting results.
Can crabgrass be eliminated permanently?
Yes! Consistent pre-emergent use combined with maintaining thick turf can eventually wipe out crabgrass.
What’s the fastest way to remove crabgrass?
Post-emergent herbicides kill active plants within days. For small areas, pulling by hand works fast.
Does mowing spread crabgrass?
If seed heads are present, mowing can spread seeds. Mow regularly before seed formation and clean your mower afterward.
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