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Alnus crispa/Green Alder, Northern Alder


A shrubby tree in Ankorage, Alaska

Dark green foliage in Alaska

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Scientific Name: Alnus crispa
Common Name: Green Alder, Northern Alder
Hardiness Zone: 3, 4, 5 Determine Your Zone
Height: 10-15 feet
Bloom time: Spring
Flower color: Yellow
Fruit color: Red
Light Exposure: Sun, Part Sun
Drainage: Well drained, Moist
Rate of Growth: Moderate
Water Requirement: Low
Maintenance Level: Low
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Comments: Grows from Labarador to Alaska and southward at high altitudes of the mountains areas even those in North Carolina and Tennessee. A large shrub or small tree up to 25 feet in height. Flowers not showy and seeds are a reddish samara which are mature in late summer. Requires a moist soil and cool summer for best growth.