Common Name: white ash
Origin/Ecology: Native to eastern North America. Glades, moist low woods along streams, bluffs and slopes.
Habit: Grows to 60-80′ tall. Pyramidal when young, maturing to rounded crown.
Leaves: Odd-pinnate compound leaves with 7 leaflets (sometimes 5 or 9). Oval to oplong-lanceolate leaflets (3-5″ long) are dark green above and whitish green below. Foliage turns yellow with purple shading in fall.
Leaf Arrangement: Opposite
Flowers and Fruit: Dioecious. Clusters of apetulous purplish male and female flowers on separate trees in April-May before foliage. Drooping clusters of winged samaras (to 2″ long) persist through winter.
Bark: Gray bark, distinctive diamond-shaped ridging on mature trees.
Water Use, Soil: Moist, organically rich, well-drained loams. Moderate drought tolerance. Neutral to slightly alkaline soils.
Exposure: Full sun. Best protected from strong winds.
Landscape Uses: Shade tree, streets and lawns.
Limitations: Emerald ash borer.
Other Features: Laterally compressed nodes, squat buds, always flattened between nodes. Shallow roots will lift sidewalk.