06/07/2026
Identifying ash trees is an important skill for any landowner or outdoor enthusiast. With Emerald Ash Borer (EAB) now established in many areas, knowing which trees are ash can help you monitor their condition, watch for signs of decline, and assess potential risks. Dead and dying ash trees can become hazardous over time, making early identification valuable for management and safety.
Here are some tips for identifying ash trees:
Identifying ash bark: Diamond-shaped furrows between flat ridges are common on larger ash.
Identifying ash leaves: Compound leaves with 5–7 (occasionally 9) leaflets. Leaflets have pointed tips and coarse serrations. One of the few Minnesota tree species with opposite branching, where buds and branches grow directly across from each other on the stem.
Identifying ash buds: During the winter, ash buds are very similar in size and color to a chocolate chip. In Minnesota, no other tree produces a similar bud.
Learn more about EAB: duluthmn.gov/parks/natural-resources/invasive-species/eab/