Corcoran Perry & Co logo

Back To Blog

Is the Killer Emerald Ash Borer Headed to Metro Denver?

The answer is yes. The Emerald Ash Borer is the single-most destructive pest of urban forests in American History, according to Jim Sudderth, Senior Forestry Inspector for the City of Denver. It has devastated ash trees in eastern states and is marching west. Experts now report that the Emerald Ash Borer was confirmed in Boulder in September 2013, and most recently this August in Broomfield. But the news isn't all bad.

Metro Denver Homeowners Can Take Steps to Prevent Ash Tree Disease

According to Sudderth, the spread is slow in Colorado AND there's hope for saving your treasured ash trees. A treatment can be applied BEFORE the pest attacks a tree, which will prevent infestation and the certain death of the tree. Once infected by Emerald Ash Borer, treatment can prolong tree life, but will not kill eradicate the pest.

Be a Smart Ash

What can you do now to prevent Emerald Ash Borer infestation? Contact a licensed tree care professional to get a plan in place! Ultimately the cost can be minimal compared to the cost of removing dead trees. In fact, you've probably noticed the City of Denver has already been treating trees, marked by the œBe a Smart Ash signs on trees around town. The city won't be treating your private property trees, but will protect trees in parks and rights-of-way that are 12-inches plus in diameter,and in fair or better condition. Property owners still need to treat smaller trees in the right-of-way, and any size trees on their private property.

ash tree disease
Images courtesy of Be a Smart Ash

Denver's Tree Canopy is Worth Saving

A full 25 percent of Denver's Tree Canopy is ash, so the stakes are high to preserve our green and shady spots. If you decide to remove a tree in the right-of-way, the city will provide a free replacement tree with a varietal appropriate to your location. Examples include aok, honey locust, sycamore and various ornamental species such hawthorns or maples.

emerald ash borer

Protecting Denver's Tree Canopy Protects Your Investment

Ultimately, as trees die from Emerald Ash Borer, property owners will be required by the city to remove them. It won't be long before infested and dying trees will become part of property disclosures and points of negotiations during sales. So save yourself the sadness and expense of removing trees and treat now.

How to Identify if youHave an Ash Tree

Check out the City of Denver's Be a Smart Ash websiteand use theirtools to identify whether you have an Ash tree. And remember, Be a Smart Ash!

Recommended Reading

Denver's Best Neighborhoods for Shade

The Greatest Parks in Denver

Explore Denver Real Estate

Homes for Sale

Add Comment

Comments are moderated. Please be patient if your comment does not appear immediately. Thank you.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Comments

  1. No comments. Be the first to comment.

Recommended Reading

The Elevated List: The 7 Best Paddleboarding Lakes in Colorado06.04.2026

alt tag
When people picture Colorado, they usually think of jagged mountain peaks, rugged hiking trails, and extreme cycling. They [...]

Denver's Best Dog Parks for Grateful Pet Parents and Delighted Pups05.20.2026

alt tag
Dogs are some of the most social creatures in the animal kingdom, so it’s time to fill up those fur minglers’ warm weather [...]

The Elevated List: New Colorado Restaurants Michelin Will Rave About05.07.2026

alt tag
It was 2016. Hip restaurant featured glassy mercury finishes, a crystal chandelier, and industrial-style tables. The [...]

Best Spas of Colorado: The Elevated List (Mother's Day Edition)04.15.2026

alt tag
To adequately thank the one who keeps the backpacks packed, the boo-boos bandaged, and the house feeling like a home, gift [...]

The Elevated List: Colorado's Best Bakeries03.18.2026

alt tag
Colorado has a reputation for altitude, outdoors, and craft beer. The bakery part is newer to the conversation, but it has [...]

Denver Restaurant Week 2026 Guide: Make Your Reservation Already03.05.2026

alt tag
Denver Restaurant Week has been running since 2005, when it launched with a $52.80-per-couple prix fixe, a nod to the [...]

The Modern That Lasted: Mid-Century Modern Homes in Denver02.27.2026

alt tag
If you know Don Draper, you know the mid-century modern aesthetic. And even if you don’t, you’ve seen it in the optimism of [...]

The Elevated List: Colorado's Best Chocolate Shops for an Artisan Valentine's Day02.05.2026

alt tag
You know the chocolate shop. The one with the oversized stuffed bear stationed outside like a Valentine’s-day sentry. [...]

2026 Denver Free Days List - Dates, Locations, and Details01.07.2026

alt tag
Fellow thrifty Denverites, we all know things don't cost what they used to: groceries, houses, even car maintenance. But [...]

Celebrating in Style: Denver New Year's Eve Events 12.23.2025

alt tag
The dimming of The Mile High City’s festive lights and packing of the evergreen boughs signal the end of the winter holiday [...]

Say Hello

Do not fill in this field:
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.