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Philadelphus californicus

Californian mock orange

An elegant, upright, pendulous, deciduous shrub species native to California, growing to 3m tall, with arching branches of bright green foliage and slightly fragrant, pure white flowers appearing in racemes in summer

Synonyms
Philadelphus californicus
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Size
Ultimate height
2.5–4 metres
Time to ultimate height
5–10 years
Ultimate spread
2.5–4 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Alkaline, Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer White Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

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

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Hydrangeaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
Genus

Philadelphus are deciduous shrubs with simple, opposite leaves and bowl-shaped, usually fragrant flowers which may be solitary or in small panicles or racemes in summer

Name status

Correct

How to grow

Cultivation

Grow in moist, well drained soil in sun to partial shade. Plant bare root plants in winter when the ground is not frozen or waterlogged. Incorporate lots of well-rotted manure or garden compost to improve the soil and water in well. Mulch in spring

Propagation

Propagate by softwood or hardwood cuttings

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Low Maintenance
  • Flower borders and beds
Pruning

Pruning group 2

Pests

May be susceptible to aphids

Diseases

May be susceptible to honey fungus (rarely) and powdery mildews

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