Incense Cedar

Calocedrus decurrens

Cupressaceae · coniferous tree · native

Last updated

Incense cedar (Calocedrus decurrens, Cupressaceae) is a slow-growing native conifer from western Oregon to Nevada and south into California, found at elevations of 700 to 2,500 meters. It develops a narrow conical form reaching 70 to 110 feet in cultivation and 100 to 150 feet in the wild, with a lifespan exceeding 1,000 years. Dense fan-like sprays of lustrous dark green foliage show little winter browning. Light to reddish-brown bark and cylindrical female cones with distinctive paired scales resembling duck beaks are identifying features.

Incense cedar grows in sun to part shade on a range of soils, preferring moist, well-drained, slightly acidic sandy loam (pH 4.6 to 7.1), hardy in Zones 5a to 8b. It has low water needs, medium drought tolerance, and a minimum root depth of 60 inches. Maintenance is low. Documented diseases include Seiridium canker, Port Orford cedar root rot, leaf blight, and cedar flagging. The cultivar 'Maupin Glow' offers yellow-and-green foliage at 8 feet. The wood has been the primary material for wooden pencils due to its soft, easily sharpened character.

Quick Facts

Height
40-80 ft (in PNW cultivation); 100-150 ft (wild)
Spread
6-15 ft
Growth Rate
Moderate
Light
Sun to Part Shade
Soil
Adaptable
Water
Low
Hardiness
Zone Zones 5a–8b
Origin
Western Oregon to Nevada

Phenological Calendar

Stage Typical Window
'New growth flush' BBCH '11' 'February 15 - March 15'
'Pollen release' BBCH '61' 'May 1 - May 31'
'Pollen shed complete' BBCH '69' 'May 15 - June 15'
'Cone development' BBCH '71' 'June 1 - August 31'
'Cone maturity and seed shed' BBCH '85' 'September 1 - November 30'

Diseases: Regionally Documented (7)

Cultivars (1)

'Maupin Glow'
Yellow and green variegated foliage. Dwarf form, mature height 8 ft. source: OSU Landscape Plants
Hardy to USDA Zone 6. source: OSU Landscape Plants
Data Maturity
Baseline Extension data. Expert review underway.