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Campanula portenschlagiana AGM

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© RHS 2002

Characteristics

Plant type

Alpine/Rockery

Habit

Mat forming

Resilience

Hardiness

H5 (hardy - cold winter)

Colour

Flower

Dark Purple in Summer

Foliage

Green in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

wall bellflower

Family

Campanulaceae


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

C. portenschlagiana is a low-growing perennial quickly forming an evergreen mat of small, rounded leaves. Bell-shaped violet-blue flowers 2cm in length borne freely on branching stems to 20cm in height, in summer

Other common names

  • Adria bellflower
  • wall bellflower

Synonym(s)

  • Campanula muralis

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing, North-facing, West-facing or East-facing
  • Exposed or Sheltered

Cultivation

Ideal for rock gardens or sunny borders. Will not tolerate wet winters

Soil

  • Well-drained or Moist but well-drained
  • Acid, Alkaline or Neutral
  • Loam, Chalk or Sand

Propagation

Propagate by seed or basal cuttings

Suggested planting locations and garden types

City/Courtyard Gardens, Cottage/Informal Garden, Garden Edging, Gravel Garden, Ground Cover, Patio/Container Plants or Rock Garden


How to care

Pruning

No pruning required

Pests

May be damaged by slugs and snails

Diseases

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