An ideal hanging-basket or shelf plant with wide-open star-shaped blue or lavender-blue blossoms that cover the trailing stems during summer and fall. The white flowers of the very popular C. isophylla alba are particularly attractive.
Campanulas like lots of fresh air, and good light except during summer when they should be lightly shaded. Soil can be garden loam, or good garden soil with well-rotted manure and peat or humus added. Sow seed in spring in peat pots which are put in the basket when plants are large enough. Pinch frequently up to the end of May to insure bushy plants. Water well during summer but allow soil to become fairly dry between waterings. Apply a complete fertilizer while plants are in active growth.
In late fall, when plants show signs of diminishing bloom, cut back to about 6 inches and continue in growth on the dry side. In spring when a new growing cycle begins, repot in fresh soil and increase watering. As soon as spring growth is established, cuttings can be taken to start new plants.