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Clustered Bellflower
Perennial species; clump‑forming
At‑a‑glance
- Group/Class: Perennial species; clump‑forming
- Height × spread: 12-18 in × 6-12 in (30-45 cm × 15-30 cm)
- Bloom window: May to July
- Color & flower form: Violet to lavender‑blue; dense terminal clusters; single
- Fragrance: 0 none
- USDA hardiness: zones 3-8
- Breeder / Year / Origin: unknown
- Cut‑flower notes: Good cut per botanic‑garden notes; typical vase life unknown
- Pet safety: safe
How it differs
- Densely clustered heads rather than solitary bells
- More upright and robust than many low, creeping species
- Cold‑hardy and dependable in northern gardens
- Can spread by rhizomes more than many clumpers
Strengths
- Showy early‑summer display
- Good for cutting and pollinators
- Deer browsing is uncommon
- Hardy across cold climates
Care in one minute
Light: full sun in cool climates; light afternoon shade where summers are hot
Soil: average, well‑drained; avoid waterlogged sites
Water: regular moisture through spring bloom
Groom: deadhead spent stems to focus energy into the clump
Divide clumps every 3 to 5 years to control spread
Watch‑outs
- Can be vigorous and spread beyond its clump
- Needs division every few years to maintain vigor
- Flowering may shorten in sustained heat
Best uses (tags)
Provenance note
Native to Europe and temperate Asia; widely cultivated and sometimes naturalized in North America.
References
- Missouri Botanical Garden Plant Finder: Campanula glomerata
- RHS: Campanula glomerata
- Native Plant Trust Go Botany: Campanula glomerata
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