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Picea sitchensis (Bong.) Carr.
USDA Symbol: pisi
USDA Native Status: Native to U.S.
The worlds largest spruce, with tall, straight trunk, from buttressed base, and broad, open, conical crown of horizontal branches. Sitka spruce is a 50-100 ft. tree wide spreading, rigidly branched and drooping branchlets. Bark is scaly and dark red-brown. Needles are green on the lower surface, white above.
The main timber tree in Alaska, Sitka Spruce produces high-grade lumber for many uses and wood pulp for newsprint. Special products are piano sounding boards, boats, and food containers. It was formerly used in aircraft construction.
Plant CharacteristicsDuration: Perennial Habit: Tree Leaf Complexity: Simple Leaf:
Brown Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: Apr , May
AK , CA , OR , WA Canada: BC Native Distribution:
Pacific Coast region from s. AK through w. B.C. to n.w. CA Native Habitat:
Moist to swampy coastal areas USDA Native Status: L48(N), AK(N), CAN(N)
Growing ConditionsWater Use: Medium
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Moist , Wet
CaCO3 Tolerance: Medium
Soil Description: Moist to wet soils.
Conditions Comments: Susceptible, especially in the Pacific Northwest, to defoliation by red spider and to malformation by spruce gall.
PropagationDescription: Sitka spruce is propagated from seed which is slow to germinate. Cuttings root in low percentages.
Seed Collection: Not Available
Seed Treatment: No treatment is necessary, but seeds may benefit from 1-3 month stratification.
Commercially Avail: yes
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CA
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Record Modified: 2007-01-01
Research By: TWC Staff