INTEGRITY IN ACTION
Glendale Tree Service Company
Serving Glendale 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.
Glendale Tree Programs
Glendale has approximately 17 acres of parks and streetscapes in the City. Trees are a significant part of Glendale’s urban environment, providing beauty, shade, and ambiance. Click here for more information about Glendale’s park and tree programs.
Emerald Ash Borer
Unfortunately, the dreaded Emerald Ash Borer (EAB) arrived in Denver in 2025, so it is just a matter of time before the insect is found in Glendale. The time to act is now because Ash has no immunity to the EAB. Property owners are generally responsible for managing and treating the ash trees on their own property. 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.
Glendale Tree Services
We work in the order that usually serves a tree best: health first, then pruning, then removal.
Plant Health Care
Our arborists diagnose pests, disease, and soil problems, then treat them. That includes emerald ash borer treatment, systemic injections, and deep root feeding.
Tree Pruning
Standards-based pruning removes deadwood, reduces risk, and keeps the tree’s structure sound without over-cutting it.
Tree Removal
When a tree is dead, hazardous, or too far gone to save, we remove it, including large trees near homes. We handle street closure permitting when a job needs it.
Which Day Do We Work Your Neighborhood?
Our estimating arborist visits each part of the Denver metro on a set weekday, based on ZIP code. In Glendale:
Monday: 80246
Not sure of your ZIP? See the ZIP code lookup, or request a complimentary estimate and the form will show your next available dates.
Glendale Frequently Asked Questions
Who is responsible for the tree between the sidewalk and the street?
In Glendale, trees in the public right-of-way are generally managed by the city. Check with Glendale’s forestry or public works staff before pruning or removing one, and call us if you want an arborist’s opinion on its health first.
Should I treat or remove my ash tree?
Emerald ash borer arrived in Denver in 2025, so it is just a matter of time before it is found in Glendale. Ash trees that still have a mostly full canopy can usually be saved with treatment. Trees that have already lost much of their canopy are usually better removed. Our arborist can tell you which applies on a complimentary visit. The Ross Tree EAB Handbook explains your options.
Are you licensed and insured?
Yes. Ross Tree is licensed, insured, and BBB A+ rated, with two ISA-certified arborists on staff. Our guide on how to choose a tree service lists what to check with any company.
How do I schedule an estimate?
Use the request service form or call 303-871-9121. You don’t need to be home for the visit.
Nearby Areas We Serve
Ross Tree also works in Denver, Aurora, Cherry Hills Village, and Englewood.
Request Service — Ross Tree
Surprising Rise in Tree Aphids in Denver
No matter the tree, a tree aphid will likely munch on it. Most do not injure plants, but some aphids are considered tree pests. Tree aphids in Denver had a good year in 2024. These soft-bodied insects were found in abundant numbers and were active until the first hard frost.
Honeylocust Tree Care
The first steps that Ross Tree takes to care for Honeylocust trees are pruning and watering. We prune mature trees to remove dead wood and cut the branches back to their strongest point to promote healthy growth. Pruning helps the trees withstand Denver’s heavy snow storms. Honeylocusts should be watered throughout the year with water applied around the tree’s drip line.
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?