Arborist Alliance Tree Service

09/13/2023

September is National Cleanup Month! Grab a friend or family member and get outside to help clean up your community.

Get involved today! https://ow.ly/qf5V50PELyA

08/21/2019

Emerald ash borer attacks and kills all true native North American ash trees, including green, white, black and blue ash, and their cultivars (including “autumn purple ash,” a popular white ash varietal in Colorado). Although rare in Colorado, white fringetree (Chionanthus virginicus) also has n...

06/21/2019

Call us if you want an evaluation on your trees for this devistating problem. We can help!

Determine if your ash tree is infested with emerald ash borer (EAB) or simply suffering from drought or other less-lethal insects. Be sure to click like if y...

04/18/2018

BROOMFIELD, Colo. - Many Coloradans plant trees in the spring because it's the best time of year to get new trees established, and communities around the state will be hosting plantings this week to recognize Colorado's Arbor Day - which this year falls on April 20.

01/18/2018

BROOMFIELD, Colo. - Trees in urban and community settings throughout Colorado are dormant now, but still require occasional watering during dry winters to remain in top health.

08/26/2017

Important info! Placement is everything.

05/17/2017

What Tree Is That? is a tree identification guide from the Arbor Day Foundation, featuring an easy-to-use, step-by-step process to identify nearly any tree in North America.

01/27/2017

FORT COLLINS, Colo. – Spruce beetle was the most damaging forest insect pest in Colorado for the fifth consecutive year, based on a 2016 forest health aerial survey conducted by the Colorado State Forest Service (CSFS) and U.S. Forest Service (USFS), Rocky Mountain Region.

05/04/2016

The city of Denver has launched a campaign to help residents identify and deal with the destructive emerald ash borer, which threatens the urban forest.

04/11/2016

In 2013, emerald ash borer (EAB) was confirmed for the first time in Colorado, in the City of Boulder. The highly destructive, non-native insect is responsible for the death or decline of millions of ash trees in 25 states and has already cost communities in the eastern U.S. billions of dollars to t…

02/19/2016

Metro Denver could see an $82 million impact from an exotic pest, according to a 2015 report on the health of Colorado's forests.

09/15/2015

We've seen a lot of this all year.

A sudden, intense drop in temperature in November 2014 severely negatively impacted trees around the Denver region.