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Campanula poscharskyana

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© RHS 1999

Characteristics

Plant type

Alpine/Rockery

Habit

Mat forming

Resilience

Hardiness

H5 (hardy - cold winter)

Colour

Flower

Blue in Autumn and Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

Up to 10 cm

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

trailing 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. poscharskyana is a spreading perennial forming a low mound of rounded leaves, with spreading stems bearing star-shaped light violet-blue flowers in summer and early autumn

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing or East-facing
  • Exposed

Cultivation

Grow in moist but well-drained soil in sun or partial shade; can be invasive as spreads by underground runners

Soil

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

Propagation

Propagate by division in spring or autumn

Suggested planting locations and garden types

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


How to care

Pruning

Cut back after flowering to maintain compact shape

Pests

May be attacked by slugs and snails

Diseases

May be subject to powdery mildews