Serbian Bellflower CAMPANULA poscharskyana
Bellflowers are among the most popular of perennials. This showy, dwarf species is often grown in rock gardens, used as an edging or for tubs and pots. Plants form a spreading patch of small green leaves, bearing loads of starry lavender-blue flowers in late spring.
Because Bellflowers are vigorous, keep it away from delicate alpine plants that could be accidentally smothered. Also may be used as a groundcover for a smaller area, especially nice under shrub roses. Clip back hard after blooming (to 2 inches) to maintain a tidy, compact appearance