It is widely cultivated for its twining habit and its highly ornamental, bell-shaped flowers, 5 cm (2 in) long, which change from white to purple. It is not hardy, and requires protection from winter frost and winds. It has gained the Royal Horticultural Society's Award of Garden Merit. A white form exists, C. scandens f. alba.
This plant has become a common weed in New Zealand, probably as a garden escape.
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