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Practical tree care advice for Denver homeowners and property managers.
Ash Trees and Emerald Ash Borer
Ash trees have compound leaves with 5 to 9 leaflets, branches that grow in opposite pairs and diamond-patterned bark. About 1 in 6 Denver trees is an ash.
Ash Trees and Emerald Ash Borer
Treat an ash that is healthy, well placed and worth keeping for decades. Remove one that is declining, small or in the wrong spot. Here is how to decide.
Ash Trees and Emerald Ash Borer
Replacing an ash in Denver? The city's free street tree program commonly plants hackberry, elm, Kentucky coffeetree, oak and catalpa. Here is how to choose.
Ash Trees and Emerald Ash Borer
Denver plants free street trees and removes and replaces small, poor-condition ash in the right-of-way at no cost. Ash trees in your yard are still your responsibility.
Ash Trees and Emerald Ash Borer
Emerald ash borer was confirmed in Denver in June 2025. About 1 in 6 trees in the city is an ash. Here is how it spread, what to look for and what you can do.
