INTEGRITY IN ACTION
Denver Tree Service Company
Serving Denver since 1978.
Keep Informed About Trees
Ross Tree believes in educating its customers about tree and plant healthcare. Our general manager, an ISA-certified arborist, has over 30 video blogs on YouTube. Homeowners use the Ross Tree Insect Calendar to identify pests munching on their yard trees. We have posted over 80 blogs about trees on our website since 2019. Ross Tree sends out a quarterly email newsletter to its customers.
Denver Tree Programs
The Denver Forester Department expects and requires property owners to maintain yard trees, but also any trees located within the public right-of-way adjacent to their property. Click here for more information about the City’s tree programs.
Emerald Ash Borer
After years of the Emerald Ash Borer (EAB) creeping closer to Denver’s city limits, the insect arrived in 2025. The time to act is now because ash trees have no immunity to the EAB. Denver’s forester expects all property owners to manage and treat their ash yard trees. Check out the Ross Tree EAB Handbook to understand your treatment options.
Tri-Level Fertilization Program
Ross Tree started its popular Tri-Level Fertilization Program in 2024. We use proprietary feeding formulations to help trees flourish in Denver’s arid climate and poor soils. The program has three feedings per year rather than two.
Denver Tree Services
Plant Health Care
Denver’s clay soil, drought and sudden temperature swings stress trees. We treat the cause: deep root feeding, tree insect control and disease treatment, including emerald ash borer treatment.
Tree Pruning and Trimming
Standards-based pruning keeps trees safe and structurally sound, and it costs less over the life of the tree than repeated corrective cuts.
Tree Removal and Stump Grinding
When a tree is dead, hazardous or too far gone to treat, we handle tree removal, including large trees and jobs that need a street closure permit, and stump grinding.
Which Day Do We Work Your Neighborhood?
Our crews work Denver on a set weekday route by ZIP code. Find your ZIP below or use the service day lookup by ZIP.
- Monday: 80237, 80246
- Tuesday: 80211, 80212, 80216
- Wednesday: 80204, 80209, 80210, 80218, 80219, 80222, 80223, 80224, 80231, 80236
- Thursday: 80202, 80203, 80205, 80206, 80207, 80220, 80230, 80238, 80239, 80247, 80249
- Friday: 80214, 80226, 80227, 80235
Denver Frequently Asked Questions
Who is responsible for the tree between my sidewalk and the street?
The Denver Forester Department expects property owners to maintain the trees in the public right-of-way next to their property, in addition to yard trees.
Do I need to treat my ash tree for emerald ash borer in Denver?
Emerald ash borer was confirmed in Denver in 2025, and Denver’s forester expects property owners to manage and treat their ash trees. Ash trees have no immunity to the beetle. Read our 2026 homeowner guide to decide between treatment and removal.
Is Ross Tree licensed and insured?
Yes. Ross Tree is a licensed and insured Denver tree company with an A+ BBB rating, in business since 1978. For tips on vetting any company, see How to Choose a Tree Service in Denver.
How do I schedule an arborist visit?
Fill out the request service form or call 303-871-9121. The form shows the next available dates for your ZIP code.
Nearby Areas We Serve
Ross Tree also works in Lakewood, Aurora, Arvada, Englewood, Edgewater, Commerce City, Glendale, and Wheat Ridge.
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Tree Care Makes Good Economic Sense
Taking care of trees makes good economic sense because they are valuable assets that increase the market value of homes. Trees shade homes on a hot day, increase curb appeal and make yards more enjoyable. But are trees worth money? The answer is yes.
Are Cottonwoods Dangerous?
Mature Cottonwood or Poplar trees tend to be large trees. Large branches break off as they die, making them dangerous to people, homes, and yards. Ross Tree has the right trucks, equipment, and expertise to remove these large trees.
Pine Tree Root System Issues
Pine tree roots can extend outwards as far as two to three times the tree’s height. When planted too close to these structures, roots can damage sidewalks, driveways, fences, and building foundations. Correct pine sapling placement is the best way to avoid pine root damage. Proper watering and fertilizing encourage deeper root growth.
A Short Guide to Aspen Trees and Their Care
Nearly all Aspens for sale in Denver came from the mountains for transplanting. So, the best way to keep them healthy trees is to recreate the environment from which they came. Aspens like slightly moist and loose soils, so plant them in a berm of sandy loam soil high enough to keep their roots out of Denver’s clay soil.
Ross Tree Company
Ross Tree is a locally owned and licensed Denver tree company that has been in business since 1978. We offer tree pruning, tree insect control, and plant health care services. Why not call a licensed, insured, trusted tree company with an A+ BBB rating?