Campanula glomerata Alba

Description

Campanula glomerata ‘Alba’ – clustered bellflower

Botanical name: Campanula glomerata ‘Alba’
Common names: Clustered bellflower
Family: Campanulaceae (bellflower family)
Plant type: Herbaceous perennial
Habit: Upright, clump-forming, spreading
Pot size: 2–3 litre pot
Eventual size: Approx. 30–45cm tall × 45cm spread
Foliage: Green, roughly oval leaves; deciduous
Flowers: Dense, rounded clusters of upward-facing white bell-shaped flowers at the stem tips in early to midsummer (June–July)
Scent: Not notably scented
Aspect / light: Full sun to partial shade
Soil: Most soils; moist but well-drained, fertile; any pH
Hardiness: RHS H7 (very hardy, below −20°C); USDA zones 3–8
Exposure: Sheltered or open
Native range: Garden form; bellflowers are native to Europe and Asia
Toxicity / pet & child safety: Generally considered non-toxic to people and pets

Campanula glomerata ‘Alba’ is a bold clustered bellflower with dense heads of upward-facing white bells in early summer. Easy and reliable, it is superb for cottage and mixed borders and loved by bees.

GardenAdvice notes

A classic, much-loved cottage-garden perennial, the bellflower (Campanula) is grown for its charming bell- or star-shaped flowers, typically in shades of blue, violet, lilac, pink or white, carried generously over a long summer season. Easy, hardy and reliable, and loved by bees, it is a mainstay of cottage, mixed and informal borders.

Growing & planting

Plant in spring or autumn in most moist but well-drained, fertile soils in full sun to partial shade — it is easy and adaptable. Space appropriately for its size. Water while establishing.

Care & maintenance

Low-maintenance. Deadhead regularly to prolong flowering, and cut the whole plant back after the main flush to tidy it and often encourage a second flush. Cut down old growth in late winter. Lift and divide congested clumps every few years in spring.

Propagation

• Division: Lift and divide established clumps in spring, as growth begins.
• Cuttings: Take basal cuttings in spring.
• Seed: Can be raised from seed, and species types often self-seed.

Pests & diseases

Generally trouble-free. Slugs and snails can graze the young growth, and powdery mildew or rust occasionally occur. Otherwise easy and reliable.

Uses in the garden

Superb in cottage, mixed and wildlife borders, where its bold clusters of white bells bring early-summer colour and attract bees; it spreads to make good clumps and is lovely with blue and pink flowers.

Wildlife value

Bellflowers are excellent for pollinators: their bell-shaped flowers are very attractive to bees and other pollinating insects over a long summer season.

Toxicity & safety

Bellflower is generally regarded as non-toxic to people and pets.

GardenAdvice tip

The clustered bellflower is a bold, easy cottage-garden plant, its dense heads of upward-facing white bells a lovely, cool contrast in an early-summer border. It spreads steadily to make good clumps; cut it back after flowering to tidy it and encourage fresh growth, and divide it every few years to keep it vigorous.

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