Campanula fragilis subsp. cavolinii

RHS Plant Profile

Cavolin brittle harebell

Dorling Kindersley Ltd

Alpine Rockery Herbaceous Perennial

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A compact perennial forming a low mound of ovate to heart-shaped, toothed leaves borne on stems to 45m long. Upturned, pale blue, star-shaped flowers 2.5-3cm across are borne 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