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Calycanthus occidentalis

western sweetshrub

A large bushy shrub with rough-textured, dark green, ovate leaves and solitary deep red flowers to 5cm across, in summer

Other common names
California allspice
Synonyms
Calycanthus macrophyllus
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Size
Ultimate height
2.5–4 metres
Time to ultimate height
10–20 years
Ultimate spread
2.5–4 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Red Green
Autumn Yellow
Winter
Position
  • Full sun
  • Partial shade
Aspect

South–facing or North–facing or West–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Calycanthaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Humans/Pets: Harmful if eaten. Wear gloves and other protective equipment when handling For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus

Calycanthus are deciduous shrubs with simple, aromatic leaves and solitary, fragrant flowers in summer

Name status

Correct

Plant range
SW US

How to grow

Cultivation

Good for woodland or stream side positions

Propagation

Propagate by seed or softwood cuttings

Suggested planting locations and garden types
  • Architectural
  • Cottage and informal garden
  • Low Maintenance
  • Flower borders and beds
Pruning

Pruning group 6

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus (rarely)

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