Clustered Bellflower Plants

Campanula glomerata Superba

For a shot of pure purple in your summer borders, Campanula glomerata Superba is a choice Prince would be proud of! Better known by its common name, the clustered bellflower, it has dense clusters of deep purple bell-shaped blooms each 3cm wide on upright stems, which are produced from June to August above rosettes of oval-shaped, mid-green leaves. An absolute classic in the herbaceous border, you'll be hard pressed to choose another plant that complements so many others.

Browse all of our perennial plants.

Features

• Colour: Deep purple blooms.
• Flowering: June to August.
• Foliage: Mid-green rosettes.
• Height: 75cm.
• Spread: 1m.
• Spacing: 1m.
• Position: Sun or partial shade.
• Soil: Loam, chalk, alkaline or neutral.
• Royal Horticultural Society Award of Garden Merit.

Great In Your Garden...

Equally happy in full sun or partial shade, Campanula glomerata Superba is ideal for the informal style of a cottage garden. It spreads by means of rhizomes (a rooting underground stem) so if it starts to crowd out its neighbours, divide plants in spring. Pair it with geraniums and delphiniums to flower together. Later-blooming, perennial anenomes will take over the show when the campanula's flowers start to fade.

Campanulas are really useful for underplanting large roses and shrubs, as the hide the 'bare ankles' of the bigger plants, which are cetainly not the best part of their display!

If you have problems with alkaline or chalky soil, C. glomerata Superba loves those conditions - grow it alongside Echinacea, Rudbeckia, lavender and herbs like rosemary, bay and fennel.

Did You Know...

Campanulas are loved by honeybees, bumblebees and solitary bees. Harebell carpenter bees and mining bees collect pollen from Campanulas and shelter in the flowers overnight.

Plant in sun or partial shade in loam, chalk or alkaline and neutral soils, moist but well-drained. Add organic matter when planting, 1m apart. Water well until established and during dry spells. Feed with an all-purpose general fertiliser in spring. No need to stake. Divide overcrowded plants in spring. Protect against slugs, snails and aphids.