White ash is another of the more common ash trees in the U.S.—a fact that assures that it, too, has been catastrophically affected by emerald ash borer. Also known as Biltmore ash, this is the largest of the native ash trees, a pyramidal tree that gradually develops a fully rounded crown as the tree ages. The bark is gray in color and develops a distinctive pattern of diamond-shaped ridges in older trees. The leaves are clusters of five to nine leaflets that are dark green on top, whitish-green on the undersides. Fall color is a purplish yellow. This species, too, is susceptible to death from emerald ash borer.
Native area: Eastern North America
USDA growing zones: 3 to 9
Height: 50 to 80 feet
Sun exposure: Full sun