Western Mountain Ash
Sorbus Sitchensis
Overview
The Western Mountain Ash, Sorbus sitchensis, is a deciduous tree native to the Pacific Northwest. It typically reaches 13 to 33 feet in height, offering a compact, rounded canopy. Foliage is pinnate, turning fiery red in autumn. Clusters of white blossoms in spring give way to orange-red berries, attracting birds. Prefers moist, well-drained soils with full sun to partial shade. Hardy to USDA Zone 6. Ideal for wildlife gardens and small spaces.
Sun Full, HalfWater Extra in Summer, MediumZones 5–9Type ShrubClimate Temperate

Culture
- Sun
- Full, Half
- Water
- Extra in Summer, Medium
- USDA zones
- 5–9
Shape & size
- Mature height
- 6–10 Ft.
- Mature width
- 4–8 Ft.
Classification
- Type
- Shrub
- Family
- Rosaceae
- Climate
- Temperate
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Photographs by 7 contributors
- Walter Siegmund, CC BY 2.5 · source
- Walter Siegmund (talk), CC BY-SA 3.0 · source
- Hedwig Storch, CC BY-SA 3.0 · source
- Walter Siegmund (talk), CC BY 2.5 · source
- Joe Mabel, CC BY 4.0 · source
- Chris Light, CC BY-SA 4.0 · source
- Jesse Taylor, CC BY-SA 3.0 · source
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