Superba clustered bellflower
Campanula glomerata 'Superba'
RHS AGM 1993
USDA zones3 to 8
SunHandles full sun to partial sun
WaterHandles moderate to moist soil
Size1.5 to 2.5 feet tall12 to 24 inches wide
- Growth rate
- Rapid
- Habit
- Clumping
- Bloom season
- Spring, summer
- Bloom color
- Violet blue to deep purple
- Soil types
- Sand, loam, chalk
- Soil pH
- Alkaline, neutral
Garden uses
Attracts
Notes
'Superba' clustered bellflower (Campanula glomerata 'Superba') is a perennial for borders, cottage gardens, pollinator gardens, and rock gardens. It is hardy to USDA zone 3, or down to -40°F (-40°C). This plant likes full or part sun and average to moist, sandy, loamy, or chalky soil. It forms a clump of violet blue to deep purple flowers in spring and summer. Butterflies, hummingbirds, and bees visit the blooms. Deer and rabbits tend to pass it by.
Pairs well with Blonde Ambition blue grama, Cytherea peony, Dancing Queen hosta, and Apricotta cosmos.