Plant Guide : Campanula isophylla

The American Horticultural Society Encyclopedia of Plants and Flowers 
Campanula isophylla
Use the perennial Italian bellflower in hanging baskets: its trailing stems, with star-like blue flowers, dangle effectively over the sides. Contrast it with white 'Alba' or 'Stella White'. Feed, but do not overwater, in summer. Bring under cover in winter.

Height: 8 inches
Spread: 18 inches

Hardiness: Plants that need protection from frost over winter
Soil Preference: Well-drained soil
Sun or Shade: Full sun, partial or dappled shade