Black Ash: This plant is native to the Northern United States and Canada. Black ash trees (Fraxinus nigra) are native to the northeast corner of the United States as well as Canada.They grow in wooded swamps and wetlands. According to black ash tree information, the trees grow slowly and develop into tall, slender trees with attractive feather-compound leaves. The common North American trees with pinnate leaves. White ash also leaves a more prominent leaf scar below each bud.

The black ash tree usually tops out at between 40 and 60 feet tall. The scars look like white curved lines.

Why Are the Leaves Turning Black & Falling Off of My Ash Tree?. It can hold its own in cold climates and tends to thrive in moist environments that get plenty of rainfall. The bark is blackish in color, and the oval-shaped leaves are deep green in the summer and spring. Identity hickory, ash, walnut, black locust or pecan using this tree leaf key and attached tips.

Black ash has black terminal buds, while white ash has brown terminal buds. The stately ash tree (Fraxinus spp.)