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Emerald Ash Borer in Denver: Why May 15 – June 15 Is the Critical Treatment Window

Emerald Ash Borer in Denver: Why May 15 – June 15 Is the Critical Treatment Window

by John Downs | May 6, 2026 | Plant Health Care, Tree Biology, Tree Health Care, Tree Insect Control, tree pruning

  Property owners, the Emerald Ash Borer (EAB) officially reached Denver in 2025, and the insect has killed hundreds of millions of Ash east of the Mississippi River. Colorado will be no different since this is a 100 percent mortality insect for untreated trees....
Cottonwood Trees in Denver: Should You Remove, Treat, or Keep?

Cottonwood Trees in Denver: Should You Remove, Treat, or Keep?

by John Downs | Apr 18, 2026 | Cottonwoods, Plant Health Care, Tree Biology, Tree Health Care, Tree Insect Control, tree pruning

Cottonwoods are native to Colorado’s Eastern Plains. They grow in wetter soils along rivers, lakes, and irrigation ditches in groves or bosques. Caring for Cottonwoods in urban landscapes requires significant space, consistent watering, and proactive pruning to manage...
Denver Tree Service

Denver Tree Service

by John Downs | Mar 18, 2026 | Plant Health Care, Tree Biology, Tree Health Care, Tree Insect Control, tree pruning

Complete 2026 Guide to Choosing the Right Arborist Finding a reliable Denver tree service should not feel like navigating a maze of Google results, conflicting reviews, and vague pricing. After working with Denver homeowners for almost five decades and maintaining...
Winter is a Great Time to Prune Most Hardwood Trees

Winter is a Great Time to Prune Most Hardwood Trees

by John Downs | Jan 14, 2026 | tree pruning

When homeowners think about keeping their trees healthy, they usually picture fertilizer, water, mulch, and maybe insect or disease treatment. But one of the most powerful, least appreciated ways to protect a tree’s long-term health is proactive pruning. Done at...
The Tree From Hell

The Tree From Hell

by John Downs | Oct 21, 2025 | Large Tree Services, tree pruning, Tree Removal

The Tree of Heaven (Ailanthus altissima) got its name from the Indonesian word “ailanto” or “ailanthus,” meaning “tree of the gods.” A better name for the tree would be Tree from Hell because it outcompetes other plants wherever it...
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