There are four species of ash grown in Moose Jaw. All have lacy textured leaves and produce straight, dry seeds that look similar to maple. All ash have a more or less oval shaped crown, with green and white ash tending to have a more open crown than mancana or black ash.
All ash trees are susceptible to ash anthracnose, ash flower gall and ash plant bug which are all largely cosmetic issues. Mancana and Black ash are also susceptible to the cotton ash psyllid, which has caused the death of trees growing in harsh locations in Saskatoon.
Green Ash (Fraxinus pennsylvanica): Green leaves turn bright yellow in fall. Oval shaped crown. Grows in wet or dry conditions. Larger tree, good for shade and boulevard plantings. Height: 15 m; Width: 8 m. Full sun. Hardiness Zone 2.
Manchurian Ash (Fraxinus mandshurica ‘Mancana’):Also known as a Manchurian Ash it has an oval to round, dense canopy and is medium headed. Lacy–textured green leaves turn brilliant gold in fall. Mancana is a seedless variety. Grows in wet or dry conditions. Beautiful specimen tree, good for boulevard plantings. Height. 12 m: Width: 6 m; Full sun. Zone 2
Black Ash (Fraxinus nigra): Similar in appearance to Mancana Ash. Lacy-textured green leaves turn a golden fall colour. Fall Gold is a popular seedless variety. Retains leaves in fall longer than most other ash. Makes a good specimen tree. Height: 12 m; Width: 6 m. Full sun. Zone 2.
White Ash (Fraxinus Americana): Upright, oval shaped crown. Foliage turns a deep purple color in early fall. Seedless varieties include Nobility and Tuxedo. Larger shade tree. Height: 15 m; Width: 9 m; Full sun. Zone 2.