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Western Serviceberry

Amelanchier alnifolia

Rosaceae · broadleaf · native

Western serviceberry (also called Saskatoon berry) is a native multi-stemmed shrub-tree of Western Washington's dry to moist forest edges and woodland transitions, a deciduous species with white flowers in spring and blue-black fruits in early summer. The bark is smooth and gray. The leaves are oval, lightly toothed, and turn red to orange in fall. The flowers appear in upright clusters (racemes), and the small berries are highly valued by birds and wildlife. The tree rarely exceeds 20-25 feet and often remains more shrubby, especially in drier sites. The form is naturally multi-stemmed, creating a fountain-like silhouette.

In Western Washington, Western serviceberry is a useful native species for dry to moist sites with full sun to part shade and adaptable soil conditions. The tree's hardiness, modest stature, and multi-stemmed habit make it valuable for naturalistic design and wildlife habitat plantings. Growth is moderate, reaching mature size in 12-15 years. The tree is relatively pest and disease-free in our region, making it a low-maintenance choice. The blue-black fruits ripen in June and are quickly consumed by birds and wildlife; if you wish to harvest berries for human consumption, use bird netting to protect ripening fruit. Fall color is reliable and warm, ranging from orange to red. For riparian restoration, understory planting, and wildlife corridors, Western serviceberry is an excellent native that has been underutilized in landscape design; its multiple seasons of interest (spring flowers, summer fruits, fall color, winter form) and ecological value make it a practical choice for diverse site conditions.

Quick Facts

Height
20–30 ft
Spread
9 ft
Growth Rate
Moderate
Light
Full Sun
Soil
Adaptable
Water
Low
Hardiness
Zone Zones 2a–8b
Bloom Time
May 1-May 31
Fall Color
Orange, purple, red, yellow
Origin
Pacific Northwest native

Phenological Calendar

Stage Typical Window
Bud break BBCH 07 Feb 15-Mar 15
Leaf emergence BBCH 11 Mar 1-Apr 1
Bloom start BBCH 61 May 1-May 31
Bloom end / petal fall BBCH 69 May 15-Jun 15
Fruit/seed development BBCH 71 Jun 1-Aug 31
Fall color / leaf senescence BBCH 93 Oct 1-Nov 15
Dormancy BBCH 97 Nov 15-Feb 28

Diseases (1)

Cultivars (1)

Regent
Common name: Regent Serviceberry Regent Saskatoon Berry; Mature height: 4–6 ft