Western Mountain Ash vs Armstrong Maple - TreeTime.ca

Western Mountain Ash vs Armstrong Maple

Sorbus scopulina

Acer x freemanii Armstrong

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Western Mountain Ash
Armstrong Maple

Western Mountain Ash is a popular ornamental tree native to the western part of North America. Its attractive, white clusters of flowers bloom in early summer, making way for red, yellow or orange fruit in the fall. If the fruit doesn't catch your eye, Western Mountain Ash's autumn colours will capture your–and the birds's–attention.

The Armstrong Maple has a narrow, upright columnar growth habit. This stunning tree has showy leaves that range from yellow, orange to red in the fall. It is an attractive hybrid of the Red Maple and Silver Maple. It prefers acidic soils and will have some tolerance for drought once mature.

Edward Murray named the Armstrong Maple in 1969 in honor of Oliver M. Freeman of the National Arboretum, who made the first controlled cross between the two species in 1933.

Western Mountain Ash Quick Facts

Armstrong Maple Quick Facts

Zone: 2a
Zone: 3a
Height: 9 m (30 ft)
Height: 15 m (50 ft)
Spread: 6 m (20 ft)
Spread: 6 m (20 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal, wet
Growth rate: medium
Growth rate: fast
Life span: medium
Life span: long
Suckering: none
Suckering: high


Fall colour: orange/yellow
Flowers: white
Berries: bunches of orange-red berries appear in late summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, YT, NT
Other Names: cascade mountain ash, greene mountain ash
Other Names: armstrong red maple