Campanula lactiflora Avalanche ('Camblo')

RHS Plant Profile
milky bellflower [Avalanche]

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milky bellflower [Avalanche] RHS
milky bellflower [Avalanche] RHS

Synonyms

Campanula lactiflora 'Camblo'

Plants for pollinators
Herbaceous Perennial
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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

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Clay Loam
Moisture
Moist but well–drained
pH
Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
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
Campanulaceae
Native to GB/Ireland
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 susceptible to a rust, powdery mildews and a leaf spot