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Western Mountain Ash

Sorbus scopulina

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Western Mountain Ash (Sorbus scopulina) at Lakeshore Garden Centres

Western Mountain Ash flowers

Western Mountain Ash flowers

(Photo courtesy of NetPS Plant Finder)

Western Mountain Ash (Sorbus scopulina) at Lakeshore Garden Centres

Western Mountain Ash in bloom

Western Mountain Ash in bloom

(Photo courtesy of NetPS Plant Finder)

Western Mountain Ash (Sorbus scopulina) at Lakeshore Garden Centres

Western Mountain Ash in fall

Western Mountain Ash in fall

(Photo courtesy of NetPS Plant Finder)

Height:  20 feet

Spread:  18 feet

Sunlight:  full sun 

Hardiness Zone:  2a

Description:

A tough yet attractive accent tree for small landscapes, with showy clusters of white flowers in spring followed by orange-red berries lasting into winter; compound leaves turn fiery red and orange in fall; needs well drained soil, resistant to disease

Ornamental Features

Western Mountain Ash features showy clusters of white flowers held atop the branches in mid spring. The orange fruits are held in abundance in spectacular clusters from early to late fall. It has dark green deciduous foliage. The oval compound leaves turn an outstanding scarlet in the fall. The smooth brick red bark adds an interesting dimension to the landscape.

Landscape Attributes

Western Mountain Ash is a dense multi-stemmed deciduous tree with a more or less rounded form. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.

This is a relatively low maintenance tree, and is best pruned in late winter once the threat of extreme cold has passed. It is a good choice for attracting birds to your yard. It has no significant negative characteristics.

Western Mountain Ash is recommended for the following landscape applications;

  • Accent
  • Shade

Planting & Growing

Western Mountain Ash will grow to be about 20 feet tall at maturity, with a spread of 18 feet. It has a low canopy with a typical clearance of 2 feet from the ground, and is suitable for planting under power lines. It grows at a medium rate, and under ideal conditions can be expected to live for 40 years or more.

This tree should only be grown in full sunlight. It is very adaptable to both dry and moist locations, and should do just fine under average home landscape conditions. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. This species is native to parts of North America.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Accent  Shade 
Applications
Flowers  Fruit  Fall Color  Bark  Winter Value  Attracts Wildlife 
Ornamental Features