Outstanding Features:
Attractive yellow to purple fall color.

Description:
Height: 40-70'
Width: 20-50'
Hardiness Zone: 4a

White Ash is an excellent landscape tree in sites where it is adapted. It has an upright oval form, developing a rounded crown. Leaves are pinnately compound with 5­9 (usually 7) leaflets. Leaves are dark green with a lighter underside. Fall color develops early and ranges from yellow to red­purple. Native from east central Minnesota eastward.

Requirements and Culture:
Prefers a rich, well drained soil and ample moisture. Adaptable to a wide range of soil pH. Full sun. White Ash is fairly salt tolerant. Bark tissues on the trunks of young, rapidly growing trees harden off very late in the season. This can result in severe winter injury in years with extreme cold temperatures early in the winter. To help prevent this problem it's best not to encourage rapid growth on young trees.

Limitations:
Not very drought tolerant. Susceptible to ash yellows, a mycoplasma-like organism that may become a serious problem. Susceptible to borers when under stress. Ash flower gall on male flowers can be unattractive.

Selected Cultivars:

`Autumn Blaze' - is a new cultivar introduced by the Morden Manitoba Experiment Station. It has an oval crown and develops a good purple fall color. Winter hardy in zone 3b.

`Autumn Purple' ­ has a good round oval crown and develops an excellent maroon to purple fall color.

`Manitou' - has a narrow oval form with an upright branching habit. Does not develop a good fall color.

`Skyline' - has a symmetrical oval form with glossy green leaves. Good street tree.

Photo Credit: 1 E. Hasselkus; 2 DCTC. Photo 1 is `Autumn Purple'.

Minnesota Power | University of Minnesota | Northern States Power Company

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