Calocedrus decurrens

RHS Plant Profile

incense cedar

RHS 1999

Other common names

white cedar

Synonyms

Libocedrus decurrens

Conifers Trees

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An evergreen conifer of narrowly columnar habit, with flaking bark. Foliage rich, glossy green, in short sprays, occasionally with small cones which soon fall

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

Higher than 12 metres

Max Spread

4-8 metres

Size

Time to Maturity: 20–50 years
Max Spread: 4-8 metres
Max Height: Higher than 12 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: South–facing or North–facing or West–facing or East–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Cupressaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Columnar upright
Genus: Calocedrus are evergreen trees with tiny, scale-like leaves arranged in ranks on the shoots, forming flattened sprays of foliage, with small ovoid cones
Name Status: Correct
Plant Range: W N America

How to Grow

Cultivation

Grows well in any well-drained soil. Good as specimen tree

Propagation

Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types

Architectural
Low Maintenance

Pruning

No pruning required

Pests

May be susceptible to aphids

Diseases

May be susceptible to honey fungus