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Herbaceous Perennial

Campanula glomerata 'Superba'
  • RHS AGM
  • RHS Plants for pollinators

clustered bellflower 'Superba'

'Superba' is a strong-growing rhizomatous perennial forming a wide colony of erect stems to 60cm, with oblong to ovate leaves and dense clusters of deep violet-purple, bell-shaped flowers 3cm in length

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.5–1 metres
Growing conditions
Chalk
Loam
Moisture
Moist but well–drained
pH
Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Purple Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

North–facing or West–facing or South–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H7
Botanical details
Family
Campanulaceae
Native to the UK
No
Foliage
Deciduous
Habit
Suckering
Genus

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

Name status

Accepted

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How to grow

Cultivation

Best grown in fertile, neutral to alkaline soil that is moist but well-drained, in partial shade or sun. No need to stake

Propagation

Propagate by division in spring or autumn or take basal cuttings in winter

Suggested planting locations and garden types
  • Cottage and informal garden
  • Wildflower meadow
  • Flower borders and beds
  • Cut flowers
  • Underplanting of roses and shrubs
Pruning

Cut back after flowering to encourage a second flush of flowers

Pests

Damaged by slugs, snails and aphids

Diseases

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

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