A pretty, trailing form, also called star-of-Bethlehem, falling stars, or Italian bell-flower, this campanula from northern Italy looks good tumbling from a pot or a hanging basket. The star-shaped flowers are produced throughout summer and fall, and are usually violet-blue, although white (C. isophylla ‘Alba’) and variegated (C. ‘Balchiniana’) are also available.
There is also a double cultivar, ‘Flore Pleno.’ The stems and leaves are bright green and slightly brittle. If they are broken, they exude a distinctive smell and a milky white sap.
Size: Height to 1 ft. (30 cm).
Light: Indirect sunlight.
Temperature: Normal room or cooler; winter minimum 45°F (7°C).
Moisture: Keep thoroughly moist during spring and fall, slightly drier in winter.
Feeding: Give standard liquid fertilizer every two weeks during late spring and fall.
Propagation: Take tip cuttings, 2 in. (5 cm) long, in spring. Root them in potting soil or water.
Special needs: Remove flowers as they fade to prolong the flowering period. In fall, when flowering is over, cut stems back close to the base.