Ash trees are common yard and woodlot trees found throughout Wisconsin. Ashes are very tolerant of urban environments and have been planted extensively as street trees. Until now, ash trees have had few serious insect and disease problems.
There are four native species of ash in Wisconsin: green, white, blue and black ash. Leaves are compound (with 5-9 leaflets) and are attached to opposite sides of a twig.
Additional information about Wisconsin’s native ash species can be found at the Wisconsin State Herbarium site.