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Annual Biennial

Phacelia campanularia
  • RHS Plants for pollinators

California bluebell

A branching, bushy annual to around 20cm tall with oval, serrated, deep green leaves and loose clusters of intense blue, bell-shaped, upward-facing flowers up to 2.5cm wide held on red stems from spring into early summer

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
1–2 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue Green
Summer Blue Green
Autumn Green
Winter
Position
  • Full sun
Aspect

South–facing or West–facing

Exposure
Exposed or Sheltered
Drought resistance
Yes
Hardiness
H4
Botanical details
Family
Boraginaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Skin allergen. Wear gloves and other protective equipment when handling
Genus

Phacelia can be annuals, biennials or perennials with pinnately divided leaves and racemes or panicles of tubular or bell-shaped blue, white or yellow flowers, attractive to insects

Name status

Correct

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How to grow

Cultivation

Grow in any fertile, well-drained soil in full sun

Propagation

Propagate by seed in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Wildlife gardens
  • Flower borders and beds
Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free

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