Serbian Bellflower

Blue Waterfall is a low-growing Serbian bellflower with blue, star-shaped flowers and green foliage. Its established size of about 16 inches tall by 20 inches wide suits a rock garden, path edge, or container. ## Flowers and garden use The [Van Noort Bulb product listing](https://www.vannoortbulb.com/products/campanula-posch-blue-waterfall) identifies the variety as *Campanula poscharskyana* 'Blue Waterfall' and lists blue flowers from May through October. The [RHS species profile](https://www.rhs.org.uk/plants/2964/campanula-poscharskyana/details) describes the species as a spreading, low mound with star-shaped violet-blue flowers. Flower timing varies by climate. ## Size and placement Van Noort reports an established height of 40 cm and spread of 50 cm. Use its low profile near a path, wall, or border edge, with room for the foliage to widen. Plant it where the blue flowers can be seen without crowding smaller alpine plants. ## Light, soil, and water Van Noort lists full sun or partial shade. The RHS recommends moist but well-drained soil for the species. Water new plants through establishment and during extended dry periods; avoid a site that stays waterlogged. ## Maintenance Remove faded flowers to tidy the planting. If older stems flop after flowering, trim them back to encourage fresh basal growth. Divide the clump when it becomes crowded.