Incense Cedar

Calocedrus decurrens

Incense Cedar is an aromatic evergreen conifer native to California and parts of Oregon with a narrow pyramidal habit suited to screens and specimen planting.

Key Facts

  • Evergreen conifer native to California and southwestern Oregon.
  • Aromatic wood and foliage with flattened spray like foliage.
  • Narrow pyramidal to columnar habit suited to screens and specimen planting.
  • Tolerates dry, rocky soils once established.
  • Used for windbreaks, screening, and timber including fence posts and pencils.
  • Cones are small and inconspicuous rather than showy flowers.
  • Moderate growth rate in garden settings.

Incense Cedar is an aromatic evergreen conifer native to California and southwestern Oregon. It forms a narrow pyramidal or columnar tree used for screens and specimens while tolerating dry, rocky sites once established.

Identification

Leaves form flattened sprays that give the foliage a feathery look and release a cedar aroma when crushed. Mature trees in landscapes commonly reach about 40 to 60 feet tall with a 10 to 20 foot spread. Reproductive structures are small inconspicuous cones rather than showy flowers.

Best uses and where to grow

Use Incense Cedar as a tall narrow screen, windbreak or specimen where a columnar habit is preferred. It performs well on well drained rocky or shallow soils and tolerates dry conditions after establishment. Avoid sites that remain waterlogged because poor drainage leads to decline.

Planting and spacing

Space trees roughly 10 to 20 feet apart to match the expected mature spread and preserve airflow for healthy foliage. Plant during a cooler part of the year in your region such as fall or spring so roots can establish before summer heat or winter freeze. Keep the root ball moist while new roots form.

Soil and light requirements

Incense Cedar prefers well drained soils and accepts neutral to slightly acidic pH. Full sun produces the best form and vigor though light shade is tolerated. In dense shade growth will slow and form may become open or lanky.

Watering and care

After planting give regular water until the tree is established then reduce frequency. Established trees tolerate dry rocky soils but prolonged wet soil invites root problems and decline. Mulch the planting area to conserve moisture and protect roots without letting mulch touch the trunk.

Pruning and maintenance

Minimal pruning is required to maintain a natural columnar form. Remove dead or crossing branches in late winter when growth is dormant. For formal hedging cut young shoots lightly to encourage density but avoid heavy pruning into old wood where foliage may not resprout.

Propagation

Seed is the common propagation method and often benefits from cold stratification for more even germination. Cuttings from semi ripe to hardwood material can root with proper technique and rooting hormone though success varies by source and timing.

Pests and problems

Major issues arise from poor drainage and prolonged wet soil which lead to root decline. Watch for general conifer pests and stress symptoms such as browning foliage or sparse growth and address underlying water or site problems first.

Frequently asked questions

How fast does Incense Cedar grow?
Growth rate in garden settings is moderate with steady annual increase rather than very rapid spread. Mature landscape height is often in the 40 to 60 foot range.
What USDA hardiness zones are suitable for Incense Cedar?
Sources commonly list performance in USDA zones 6 through 8. Verify performance in your local microclimate before planting.
Can Incense Cedar tolerate poor shallow soils?
Yes it tolerates dry rocky and shallow soils once established but will decline in heavy soils that stay wet.
Are the cones ornamental?
No. The species produces small inconspicuous cones rather than showy blooms so cones are not typically an ornamental feature.
Is Incense Cedar suitable for screening?
Yes. Its narrow pyramidal to columnar habit makes it well suited to screens and windbreaks when spaced to allow mature spread.

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