10/28/2026
Ash Tree in Your Yard? Signs Worth Watching
Emerald ash borer, a small invasive beetle, has been found in parts of Northern Colorado. Its larvae feed under the bark of ash trees.
Once leaves drop, some signs can be easier to spot on bare branches and trunks.
Look for thinning or dead branches near the top of the tree, small D-shaped holes in the bark, vertical bark splits, and patches where woodpeckers have chipped away the outer bark.
Not sure if your tree is an ash? Ash branches and buds grow in pairs directly across from each other, and older trees often have diamond-patterned bark.
These signs can have other causes, so it's worth getting a trained eye on it. Kincaid Tree Surgery's ISA certified arborist can take a closer look if something doesn't seem right.