Full feathery buff flowers, 1m. Temperate Asia.
Frothy magenta blooms Jun-Aug, 1m. Prune after flowering. PVR - propagation for resale prohibited.
Deep violet-blue flowers May-Jun, 60cm. Easy - even competes with rough grass and wet no problem.
Lovely very large pale blue purple and amethyst-flushed flower heads May-Jul, 45cm. Cultivar of a British native plant.
Large palest icy amethyst pixie-hat bells Jun-Aug, 75cm. The strong growing equivalent of Campanula x burghaltii.
Spreader but easy to edit. Greyed lilac bells flower usefully late in the season Jul-Sep, 35cm. Discovered by Peter...
Large beautifully shaped grey-blue bell flowers over a long period May-Oct, 55cm. Easy.
Small starry soft mauve flowers May-Jul, 18cm. Walls, border edges, screes and rockeries.
Open blue-violet bells May-Jul and later, creeping or cascading perennial, 10cm.