Know your trees.
Colorado tree knowledge from the arborists who work in it every day — species, pests, care and field notes from the Front Range.
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One index across trees, shrubs, pests, diseases, care guides and articles.
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Trees
Species suited to the Front Range — characteristics, growing requirements and common health concerns.
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Shrubs
Ornamental and workhorse shrubs selected for challenging Colorado landscape conditions.
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Pests & Diseases
Identify the insects, diseases and environmental problems affecting Colorado trees and shrubs.
Identify a Problem - 04
Tree Care
Practical guidance on watering, planting, pruning, soil health and seasonal care.
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From the field
Seasonal Care · April 25, 2026
Spring Tree Care Checklist for Colorado Homeowners
Spring in Colorado is when your trees are set up for success—or start down the path of decline. After a long winter of dry conditions, wind exposure, and temperature swings, your trees need more than just water…
Soil & Roots · February 22, 2026
Biological Soil Inoculation
Most tree care in Colorado focuses on watering, fertilization, and pruning—but one of the most powerful tools for improving tree health exists below ground.
Pests & Diseases · January 17, 2026
The Amazing World of Galls: What They Are and What They Mean for Your Trees
If you’ve ever noticed strange bumps, balls, or growths on your tree leaves or branches, you’ve likely encountered one of nature’s most fascinating phenomena: Galls. While they can look alarming…
Seasonal Care · December 11, 2025
Understanding Winter Desiccation & Freeze Damage in Colorado Trees
Learn what winter desiccation is, how cold, dry conditions damage trees, and practical steps to protect evergreens and other trees from winter moisture loss.
Seasonal Care · December 8, 2025
Why Winter Watering Is Critical for Tree Health
Colorado winters look dormant, but trees are still active below ground. One often-overlooked tip: remember to water trees during winter.
Urban Forest · December 4, 2025
How Climate Change in Colorado Is Affecting the Urban Forest
Colorado’s climate has always been challenging for trees. High elevation, dry air, intense sunlight, and temperature swings make it a tough environment.
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