Boone County Arboretum
9190 Camp Ernst Road
Union, Kentucky 41091
Phone: (859) 384-4999
Fax: (859) 384-6888

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Cultural Details for Calocedrus decurrens

Common Name:

Growth Rate:
Stiff or narrowly columnar in youth, very regular in outline, with an oval-oblong head in old age

Average Mature Height:
30-50’ in landscape, 125-150’ in wild

Average Mature Width:

Flower Details:
Monoecious; male cones small oblong and yellow with 12-16 decussate stamens- pollen is shed in mid-winter; female cones small and yellowish-green.

Fruit Details:
Cones flattened, 0.75-1” long, 0.25-0.33” wide at base, tapered, yellowish brown to reddish brown when ripe in early autumn, remaining on the tree until spring, seeds 0.33” long, awl-shaped, with a large wing on one side, a small one on the other.

Fall Color:
None (evergreen)

Bark Details:
Thin, smooth, and grayish green or scaly and tinged with red on young stems; on old trunks-thick (3-8”), yellowish brown to cinnamon-red, fibrous, deeply and irregularly furrowed.

Disease / Insect Problems or Resistance:
A heart rot caused by Polyporus amarus; other conspicuous, brooming Gymnosporangium rust and a leafy mistletoe; Incensecedar scale.

Native Habitat:
Western United States from Oregon to Nevada and lower California. Introduced 1853.

Other Features:

Culture and Care:
Prefers moist, well-drained, fertile soil; full sun or light shade; shows good adaptability to different soil types; may be somewhat difficult to transplant; once established quite drought and heat tolerant; also will tolerate poor soils; Zone 5-8

This plant was blooming:

Plantings of this cultivar at Boone County Arboretum:

    The information on this page may have come from one or more of the following sources:
  • Dirr, Michael. Manual of Woody Landscape Plants. Stipes Publishing. 1998.
  • Hightshoe, Gary L. Native Trees, Shrubs, and Vines for Urban and Rural America. John Wiley & Sons. 1988.
  • North Carolina Extension Plant Fact Sheets.
  • University of Connecticut Plant Database.