Campanula fragilis subsp. cavolinii

RHS Plant Profile
Cavolin brittle harebell

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Cavolin brittle harebell Dorling Kindersley Ltd
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A compact perennial forming a low mound of ovate to heart-shaped, toothed leaves to around 45cm in height. Upturned, pale blue, star-shaped flowers 2.5-3cm across appear on short stems in summer

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
South–facing or West–facing or North–facing or East–facing
Exposure
Exposed or 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)
H5

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
Correct
Plant Range
Italy

How to Grow

Cultivation

Grows best in a well drained soil in full sun or partial shade; ideal for rock gardens or sunny borders. Will not tolerate wet winters

Propagation

Propagate by basal cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Rock garden
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Wildlife gardens

Pruning

No pruning required

Pests

May be damaged by slugs and snails

Diseases

May be susceptible to a rust, Powdery mildews and a leaf spot