Lawn care made just for Thornton, CO
Lawn plans customized to your Thornton, CO lawn and delivered to your door.

Thornton, CO – meet custom DIY lawn care
Between the Rockies and the plains, Thornton lawns face unique challenges. Sunday is a DIY lawn care subscription that makes growing a healthy lawn simpler. We analyze your exact location in Colorado, studying your soil composition, local climate patterns, and yard specifics using satellite imagery.
For Thornton, CO homes, we know you're dealing with clay-heavy soils and dry conditions. Our plans account for Colorado's 300+ days of sunshine and Thornton's specific rainfall patterns to give your grass exactly what it needs, when it needs it.
Unlike traditional lawn care with harsh chemicals and one-size-fits-all approaches, Sunday delivers tailored nutrients made with natural ingredients. Everything arrives at your door with simple instructions for when to apply.
Many homeowners in Thornton have switched to Sunday - just check our Sunday lawn care reviews to see the results for yourself.
Ready to see what Sunday can do for your Thornton lawn? Get your Custom Lawn Plan today.
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!
Lawn care for Thornton, Colorado
Typical lawn size in Thornton | 1,901 sq. ft. |
Dominant grass type in Thornton | Cool-season grasses like Kentucky bluegrass, perennial ryegrass, and tall fescue |
Typical soil pH for Thornton lawns | 7.8, slightly alkaline |
Typical organic matter in Thornton lawns | 4.8% |
Thornton lawn soil composition | 34% sand, 34% silt, 34% clay |
Key soil nutrients in Thornton lawns | Phosphorus: 152 ppm, Potassium: 377 ppm, Calcium: 4,134 ppm, Iron: 113 ppm |
Lawn care in Thornton, Colorado centers around maintaining cool-season grasses in clay-rich soils. The average Thornton lawn spans about 1,900 square feet, featuring grasses like Kentucky bluegrass and tall fescue that thrive in the region's semi-arid climate.
The soil makeup in Thornton presents both opportunities and challenges for lawn care:
- The balanced mix of sand, silt, and clay helps retain nutrients but may need extra attention for drainage
- Slightly alkaline soil pH of 7.8 affects how grass absorbs nutrients
- High calcium levels support strong root development
- Good iron content helps maintain green color during growing seasons
For healthy Thornton lawn care, focus on these practices:
- Test your soil with a soil test kit to track nutrient levels
- Apply lawn fertilizer based on your soil's specific needs
- Water deeply but less frequently to encourage deep root growth
- Mow at proper height to help grass handle Colorado's dry conditions
Want a custom lawn plan tailored to your Thornton yard? Check out our lawn care guides for more tips on growing a healthy lawn.
Sunday lawn care reviews near Thornton, CO

Sunday Best
My grass has never looked better
Robert
Thornton, CO


We live in a HOA
We live in a HOA controlled community that has a landscape company maintain our front yards. We cut them off and maintain our own lawn. Thanks to Sunday we get complements from neighbors all the time about how great our lawn looks. I tell them we use Sunday to improve our soil.
Greg
Thornton, CO

3rd Year in and my lawn is *chef's kiss*
This is the 3rd year in a row I have been using Sunday lawn care and my lawn looks 10x better than when I didn't use a lawn care plan or did it half-heartedly with store bough products. My grass is a deep green, thick and has weathered the lack of rain and abnormally high temperatures very well. I enjoy the schedule they provide and not needing to calculate things on my own. I am very happy and will keep using the service!
Aj
Thornton, CO


Happy customer in Year 2!
Year 2 of using Sunday and my lawn is green, thick, lush, grows fast and the whole treatment process is very easy to do. I'm very happy I made the switch from traditional fertilizers.
Aj
Thornton, CO

Greenest yard on the block
I have the greenest yard on the block and thickest
John
Littleton, CO

Simple and Effective!
Super easy to use! Our lawn has never looked better and we are putting in less time and effort! We also have leave of mind that it is safe for our pets and that they are giving back to wild grasslands!
Elizabeth
Thornton, CO

Sunday Best
My grass has never looked better
Robert
Thornton, CO


We live in a HOA
We live in a HOA controlled community that has a landscape company maintain our front yards. We cut them off and maintain our own lawn. Thanks to Sunday we get complements from neighbors all the time about how great our lawn looks. I tell them we use Sunday to improve our soil.
Greg
Thornton, CO

3rd Year in and my lawn is *chef's kiss*
This is the 3rd year in a row I have been using Sunday lawn care and my lawn looks 10x better than when I didn't use a lawn care plan or did it half-heartedly with store bough products. My grass is a deep green, thick and has weathered the lack of rain and abnormally high temperatures very well. I enjoy the schedule they provide and not needing to calculate things on my own. I am very happy and will keep using the service!
Aj
Thornton, CO


Happy customer in Year 2!
Year 2 of using Sunday and my lawn is green, thick, lush, grows fast and the whole treatment process is very easy to do. I'm very happy I made the switch from traditional fertilizers.
Aj
Thornton, CO

Greenest yard on the block
I have the greenest yard on the block and thickest
John
Littleton, CO

Simple and Effective!
Super easy to use! Our lawn has never looked better and we are putting in less time and effort! We also have leave of mind that it is safe for our pets and that they are giving back to wild grasslands!
Elizabeth
Thornton, CO
Let's get started
Thornton, Colorado FAQs
How to grow grass in Thornton, Colorado
Most common grass type in Thornton | Cool-season grasses |
Best way to grow grass in Thornton | Seeding |
Recommended grass species for Thornton lawns | Kentucky bluegrass, perennial ryegrass, tall fescue |
When to start growing grass in Thornton | Spring: May 15 to June 5; Fall: September 18 to October 9 |
Lawn care in Thornton, Colorado centers around cool-season grasses like Kentucky bluegrass, perennial ryegrass, and tall fescue. These grass types grow best when seeded during two key windows: mid-May to early June, or mid-September to early October. Fall tends to be the most successful time for grass seeding in Thornton due to cooler temperatures and lower weed pressure.
For the best results with your Thornton lawn care:
- Choose grass seed that matches your yard conditions
- Time your seeding project during the recommended windows
- Keep newly seeded areas consistently moist
- Mow at 3-4 inches once grass reaches proper height
The cool semiarid climate of Thornton means your grass seed needs steady moisture to germinate and establish. Plan to water lightly several times per day for the first few weeks after seeding. Once seedlings reach 2 inches tall, reduce watering frequency but water more deeply to encourage deep root growth.
Thornton, CO lawn care blogs

Winter Dormancy and Your Lawn
Lawn dormancy in winter is a natural survival mechanism for grass during cold months. With proper lawn care, your dormant lawn will bounce back in spring.

Cool-Season Lawn Care Guide
Maintaining your lawn throughout an entire year doesn't have to be overwhelming. We've created a month-by-month calendar that tells you exactly what your cool-season lawn needs throughout the seasons.

Growing a Warm-Season Lawn in the West
Learn how to grow a strong lawn in the west with warm-season grasses including bermudagrass, zoysiagrass, St. Augustinegrass, Kikuyugrass, buffalograss, bahiagrass, and paspalum.

Growing a Cool-Season Lawn in the West
Learn how to grow a strong lawn in the west with cool-season grasses including Kentucky bluegrass, annual and perennial ryegrasses, tall fescue, and fine fescue.
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.
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