Picea sitchensis

Tracheophyta PinopsidaPinaceaePiceaPicea sitchensis


An evergreen tree of plantations, especially on wetter ground, in high rainfall areas and in exposed sites. It regenerates freely in open ground, in areas of clear felling, and on Calluna heath. 0-690 m (where it has been reported as regenerating near Stuc a` Chroin, W. Perth), and probably higher.



World Distribution

Native of coastal forests in western N. America; widely planted in N.W. & C. Europe.

Broad Habitats

Coniferous woodland

Light (Ellenberg): 7

Moisture (Ellenberg): 7

Reaction (Ellenberg): 2

Nitrogen (Ellenberg): 2

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.2

July Mean Temperature (Celsius): 14.1

Annual Precipitation (mm): 1223

Height (cm): 5500

Perennation - primary


Life Form - primary

Mega-, meso- and microphanerophyte



Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 1144

Count of 10km squares in Ireland: 215

Count of 10km squares in the Channel Isles: 1

Weighted Changed Factor: 61

Weighted Change Factor Confidence (90%)


JNCC Designations


Atlas text references

Cannell MGR
1984.  Exploited plants. Sitka spruce. Biologist. 31:255-261.
FNAEC (1993b)
Hultén E
1968.  Flora of Alaska and neighboring territories.
James NDG
1982.  The Forester's Companion.
Mitchell (1972
Nixon CJ, Worrell R
1999.  The potential for natural regeneration of conifers in Britain. Forestry Commission Bulletin no. 120.