Lawn Care in Boulder, CO That Gets Your Soil
Boulder lawn care starts with alkaline soil and dry mountain air (your grass already knows this).
Between the Flatirons and Front Range, Boulder lawns play by their own rules. The cool, semiarid climate means your grass deals with alkaline soil, dry air, and temperature swings that keep things interesting.
Sunday builds custom lawn plans using 330+ soil samples from Boulder yards. We know what works here (and what doesn't).
Why Boulder yards need a local approach
- Cool-season grasses thrive with smart watering timing
- Alkaline soil balanced through proprietary lawn analysis
- Seasonal shipments matched to Colorado's growing windows
- Pesticide-free nutrients safe for kids and pets
How it works
Get yard analysis
Answer a few easy questions about your yard and location to help us create your unique plan.
Open your box
Your first box—including a free soil test—will arrive right when your lawn needs it.
Spray it on
Attach the custom fertilizer to your hose and spray. Then relax and wait for your next box!
Get yard analysis
Answer a few easy questions about your yard and location to help us create your unique plan.
Open your box
Your first box—including a free soil test—will arrive right when your lawn needs it.
Spray it on
Attach the custom fertilizer to your hose and spray. Then relax and wait for your next box!
Lawn care for Boulder, Colorado
| Average lawn size | 2,819 sq ft (based on 300 local soil tests) |
| Dominant grass type | cool-season grasses like Kentucky bluegrass, perennial ryegrass, and tall fescue |
| Typical soil pH | 7.4 (slightly alkaline) |
| Organic matter | 5.86% |
| Soil composition | 39% sand, 33% silt, 28% clay (clay loam) |
| Key nutrients | potassium 330 ppm, phosphorus 104 ppm, calcium 3,098 ppm |
Boulder lawns come with a few quirks. The soil runs alkaline with a clay loam texture, which means water doesn't always soak in the way you'd hope. Cool-season grasses do well here, but the semi-arid climate keeps things interesting.
Your soil holds nutrients but not always moisture
That clay loam base is actually pretty rich in organic matter and key nutrients. The challenge? Water tends to run off before roots get a good drink. Water deeply but less often, and avoid the classic mistake of frequent shallow sprinkles that just tease the surface. Our lawn guides can help you nail the timing.
Curious what your yard actually needs? Get your free lawn analysis and take the guesswork out of it.
Sunday lawn care reviews near Boulder, CO
Highly Recommend! Living in a
Highly Recommend! Living in a high altitude desert, Sunday has kept my yard green and healthy all summer long.
Shane
Longmont, CO
Lawn Care in Boulder
We are very happy Sunday customers in our second year of Lawn Care Program. After a rough winter we decided to over-seed using your Fescue Mix. Bare patches gone, lawn is much healthier. Easy to use, our cat's much happier with your products. Of course, 12 inches of Spring rain didn't hurt either.
Geof
Elder Ave, Boulder, CO
Great Results in Colorado
Sunday products have worked great. Lawn looks terrific - green and healthy.
Thomas
Longmont, CO
Beautiful lawn
My lawn is lush and green with the Sunday plan, even with Colorado's hot dry summers and fairly minimal watering!
Mark
Boulder, CO
Colorado Lawn Transformation
Sunday was a game changing experience for my lawn. Even though lawn care is a seasonal tasks in Colorado it can still be a challenge with frequent changes in temperature and moisture on an annual basis. My yard was very patchy and overrun by weeds when we moved in back in 2017. I found Sunday in the Spring of 2019 after searching for fertilizer safe for my pets. The yard has transformed over the past two years and continues to improve with each application. I appreciate the excellent customer experience as well whenever I have a question or concern.
Thomas
Brighton, CO
Easy Green Lawn
Easy and green!
Christopher
Littleton, CO
Highly Recommend! Living in a
Highly Recommend! Living in a high altitude desert, Sunday has kept my yard green and healthy all summer long.
Shane
Longmont, CO
Lawn Care in Boulder
We are very happy Sunday customers in our second year of Lawn Care Program. After a rough winter we decided to over-seed using your Fescue Mix. Bare patches gone, lawn is much healthier. Easy to use, our cat's much happier with your products. Of course, 12 inches of Spring rain didn't hurt either.
Geof
Elder Ave, Boulder, CO
Great Results in Colorado
Sunday products have worked great. Lawn looks terrific - green and healthy.
Thomas
Longmont, CO
Beautiful lawn
My lawn is lush and green with the Sunday plan, even with Colorado's hot dry summers and fairly minimal watering!
Mark
Boulder, CO
Colorado Lawn Transformation
Sunday was a game changing experience for my lawn. Even though lawn care is a seasonal tasks in Colorado it can still be a challenge with frequent changes in temperature and moisture on an annual basis. My yard was very patchy and overrun by weeds when we moved in back in 2017. I found Sunday in the Spring of 2019 after searching for fertilizer safe for my pets. The yard has transformed over the past two years and continues to improve with each application. I appreciate the excellent customer experience as well whenever I have a question or concern.
Thomas
Brighton, CO
Easy Green Lawn
Easy and green!
Christopher
Littleton, CO
Let's get started
Boulder, Colorado FAQs
How to grow grass in Boulder, Colorado
| Recommended grass species | Kentucky bluegrass, perennial ryegrass, tall fescue, fine fescue |
| Best establishment method | Seeding |
| Spring seeding window | May 15 to June 5 |
| Fall seeding window | September 17 to October 8 |
Boulder's cool, semiarid climate means your lawn faces a double challenge: alkaline soil and limited water. The good news? Cool-season grasses like Kentucky bluegrass and tall fescue thrive here when you time things right.
Seeding windows are short (and worth protecting)
Aim for mid-May or late September when soil temps cooperate. Prep matters more than you'd think: loosen compacted soil and consider a light amendment to balance that alkalinity. One common mistake? Overwatering new seed in dry air. Keep it moist, not soggy. Our seed finder tool can help match your yard's needs.
Ready to take the guesswork out? Get your free lawn analysis and we'll build a plan around your soil.
Boulder, CO lawn care blogs
How To Deal With Summer Water Restrictions
As more areas face drought and water shortages, irrigation restrictions are becoming more and more common. What do you do if you are under watering restrictions?
Lawn Care During Drought: How To Keep Your Grass Alive
Discover Sunday's science-backed approach to lawn care during droughts to help your lawn survive and conserve precious water resources.
Cool-Season Lawn Care Guide
A month-by-month guide for cool-season lawns. Learn what to do in spring, summer, fall, and winter to keep fescue, bluegrass, and ryegrass healthy year-round.
How to Train Your Lawn to Use Less Water
Learn how to train your lawn to use less water and prep for drought and heat stress before summer starts.
Join your Sunday neighborhood
Check out how many of your neighbors are already making an impact! Every home that switches to Sunday helps make your neighborhood a better place for people, pets, and the planet.