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Lawn Care & Maintenance in Denver, CO

Quick answer

Most Denver lawns are Kentucky bluegrass, a cool-season grass fed mainly in spring and fall and seeded in late summer or early fall. Watering has to fit your provider's rules, such as Denver Water's ban on daytime lawn watering in summer. Companies applying weed control for hire must be licensed by the Colorado Department of Agriculture.

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Most Denver lawns are Kentucky bluegrass, a cool-season grass that greens up early in spring, slows down in summer heat and recovers in fall. Colorado State University Extension calls it the most widely used lawn grass in the state. It looks great with enough water, but it is also the thirstiest part of most yards, so lawn care here is as much about watering wisely as it is about fertilizer.

Know your grass

  • Kentucky bluegrass: dense, soft and quick to repair itself, but it needs regular irrigation to stay green through July and August.
  • Turf-type tall fescue: looks similar to bluegrass, and CSU Extension demonstration plots have found it holds up to drought better.
  • Buffalograss and blue grama: native warm-season grasses that need much less water, but they are green mainly in summer and tan the rest of the year.
  • Fine fescues: useful in shady or low-traffic areas.

Seasonal timing

Cool-season lawns are fed mainly in spring and fall, with lighter feeding in midsummer heat. Fall is also the best time to seed thin areas, and CSU Extension suggests late August to early September for bluegrass seed. Core aeration in spring or fall helps compacted clay lawns take in water. If your lawn is buffalograss or blue grama, the schedule flips: those grasses grow in summer, so fertilizing a dormant warm-season lawn in early spring wastes product.

Mowing

  • Mow often enough to remove no more than about a third of the blade at a time.
  • Taller mowing shades the soil and helps bluegrass and fescue through hot, dry spells.
  • Keep blades sharp; torn tips turn brown and lose more water.
  • Leave clippings on the lawn to return nutrients.

Watering within the rules

Denver Water does not allow lawn watering between 10 a.m. and 6 p.m. from May 1 to October 1, and in 2026 it declared a Stage 1 drought with two assigned watering days a week. Other providers in the metro set their own schedules. A good lawn company will tune irrigation run times to your allowed days, use cycle-and-soak on clay, and tell you when a lawn is better off going partly dormant than being pushed.

Pests and weeds to know

Japanese beetle has spread through the Denver metro and along the Front Range, and its grubs feed on turf roots. Billbugs, ascochyta leaf blight and necrotic ring spot also show up in bluegrass. Bring samples to your county CSU Extension office for identification before paying for a treatment you may not need.

Pesticide licensing

In Colorado, a business that applies pesticides for hire, including weed control, weed-and-feed products and even products marketed as organic, must hold a commercial applicator license from the Colorado Department of Agriculture. Mowing, fertilizing and aeration alone do not require that license. You can check a company with the department's applicator search.

What to ask before signing up

  • What is included in each visit, and how many visits per year?
  • Is the program matched to my grass type and watering days?
  • Are you licensed by the Colorado Department of Agriculture to apply pesticides?
  • How much notice do you give before applications?

Ready for help? Request a lawn care company in the Denver metro and tell us your grass type if you know it.

See how it works

How a sprinkler zone waters a lawn. Press the buttons to run each step and see what happens inside. Made with Colorfigures ·
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Frequently asked questions

What is the best grass for a Denver lawn?

Kentucky bluegrass is the most common choice for high-use lawns. Turf-type tall fescue looks similar and handles drought better. Native buffalograss and blue grama use much less water but are green mainly in summer.

Does a lawn care company need a license in Colorado?

Mowing, fertilizing and aeration don't require a state license. Businesses applying pesticides for hire, including weed-and-feed and weed control, must hold a commercial applicator license from the Colorado Department of Agriculture.

Is it okay to let my lawn go dormant in summer?

Kentucky bluegrass can go dormant during drought and often recovers when cooler weather and water return, though long dry periods can kill some turf. Ask your lawn company and check your water provider's rules before deciding.

Sources and further reading

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