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Herbaceous Perennial

Campanula lactiflora Avalanche ('Camblo')
  • RHS Plants for pollinators

milky bellflower [Avalanche]

A herbaceous perennial with upright stems, to around 1.2m in height, that are clothed with narrow leaves and topped with white bellflowers from midsummer

Synonyms
Campanula lactiflora 'Camblo'
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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Moisture
Moist but well–drained
pH
Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer White Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Sheltered
Hardiness
H7
Botanical details
Family
Campanulaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Genus

Campanula may be annuals, herbaceous or evergreen perennials, with bell or star-shaped, often blue, flowers in late spring or summer

Name status

Trade

How to grow

Cultivation

Best grown in fertile, neutral to alkaline soil that is moist but well-drained; in partial shade or sun. Needs staking in exposed sites (see staking perennials)

Propagation

Propagate by division in spring or autumn or take basal cuttings in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • City and courtyard gardens
  • Wildlife gardens
  • Cut flowers
  • Flower borders and beds
Pruning

Deadhead after flowering to encourage a second flush of flowers partway down the stem

Pests

May be damaged by slugs and snails

Diseases

May be infected by a rust, powdery mildews and a leaf spot

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