Campanula portenschlagiana ''Clockwise''

A truly fabulous hardy perennial and superb performer, this Campanula forms compact mounds of very pretty foliage, smothered with star-shaped purple-blue flowers over a very long period from early summer.  Perfect in rockeries, hanging baskets, containers or on the edge of a garden.  Thrives in full sun or semi-shade and well-drained soils.  20x30cm approximately.