Description and general information
This bellflower grows among limestone and volcanic rocks and crevices at elevations up to 2300 m. It is found in Armenia, Turkey and the Caucasus.
The plant arises from a thickened root and forms a tuft of decumbent stems up to 20 cm in length. The leaves are deep green, glossy and shaped like those of birch (hence the common name 'birch-leaved bellflower'). From pink-tinted buds open creamy-white flowers up to 3 cm in length. It disappears back to the rootstock in winter. Like so many Campanula, it is prone to slug damage. It is hardy through zone 5.
Cultivation
This bellflower will tolerate full sun to part shade but demands a well-drained site. Too much winter-wet will kill the plant. It is adaptable to variable soil pH levels.
Bloom period
May in the south to July in the north.
Propagation
Seed and cuttings.
Seed
Seed sown at 20 C will germinate within 3 months. Seeds stratified for 8 weeks will also germinate freely. It is also known to self-seed in the garden.
Division
As the plants arise from a thick rootstock, division is not generally practiced.
Cuttings
Young shoots may be taken as cuttings prior to their producing flower buds. They generally roots in a few weeks.
References
1 Dwarf Campanulas by Graham Nicholls
2 Campanulas, A Gardener's Guide by Peter Lewis and Margaret Lynch