Brewer Spruce

Picea breweriana

Pinaceae · coniferous tree · introduced

Last updated

Picea breweriana (Pinaceae) is a rare evergreen conifer endemic to the Siskiyou Mountains of southwestern Oregon and northwestern California. It grows 50 to 80 feet tall, forming a narrow pyramidal crown with the most dramatically weeping branches of any spruce: secondary branches hang vertically up to 2.5 meters like curtains from the horizontal main limbs.

Brewer spruce is considered one of the most beautiful native conifers. It requires a cool, moist climate and grows slowly. In the wild it is restricted to high elevations on serpentine and other nutrient-poor soils. It is rarely offered in the nursery trade. Hardy in Zones 6a to 8b.

Plant Profile

Size & Form

Height
50–80 ft
Spread
16 ft
Growth Rate
Slow
Size at 20 yr
25 ft
Lifespan
Long-lived

Site Requirements

Light
Part Shade
Soil Drainage
Well Drained
Soil pH
4.6-7.5
Water
Moderate
Drought Tolerance
Low
Hardiness
Zones 6a–8b

Ornamental Interest

Bloom Time
Non-flowering
Origin
Pacific Northwest native
Watch for this season

Peak Spore Production and Dispersal

Seedling Emergence - Postemergence Damping-off Risk

RustHigh

Uredinial Stage (Summer)

Pine needle scaleHigh

Crawler Emergence

+ 4 more — see full disease and pest lists below

Diseases: Regionally Documented (16)

Pests: Regionally Documented (15)

Phenological Calendar

View full calendar (7 stages)
Stage Typical Window
Bud break BBCH 07 Feb 15-Mar 15
Leaf emergence BBCH 11 Mar 1-Apr 1
Pollen release BBCH 61 Jun 1-Jun 30
Pollen shed complete BBCH 69 Jun 15-Jul 15
Cone development BBCH 71 Jun 1-Aug 31
Cone maturity and seed shed BBCH 85 Sep 1-Nov 30
Dormancy BBCH 97 Nov 15-Feb 28
Data Maturity
Structured Multiple sources. Expert review underway.