Habit: Splendid large tree, planted in parks, 20-25 (40) m tall, 20-25 m wide, branches ascending, crown pyramidal, mature trees round to ovate crown, fast-growing.
Flowers: Purple-green, dioecious, April / May, before or when leaves emerge.
Leaves: Deciduous, non-uniform, pinnate, 15-30 cm long, dark green above, whitish green beneath; budburst later than F. excelsior, light brown, tapered buds, autumn colour purple-yellow to orange.
Roots: Cordate, shallow and far reaching secondary roots.
Fruits: Loads of green, later brown, winged nuts, 2-5 cm long, rather small, easy sprouting, many male seedless varieties are available.
Bark: Dark grey, distinctly sulcate.
Demands: Sun, initially tolerant to shade, mature trees require more light, frost hardy, resistant to urban climates and wind.
Soil: Nutritious, moist, well-drained, acidic to slightly alkaline.
Vegetation: In mixed deciduous and conifer forests of North America the White Ash grows socialised with Sugar maple, Tulip poplar, American beech and American sweetgum. In the North it is found in altitudes of up to 600 m, in the South up to 1500 m.
Note: Most common ash species of North America, of high silvicultural importance. Hardiness: Zone 5a