Blue Waterfall Bellflower (Campanula poscharskyana 'Blue Waterfall')

Blue Waterfall Bellflower (Campanula poscharskyana 'Blue Waterfall') is a compact perennial with leathery, toothed bright green foliage that is semi-evergreen. Lavender-blue flowers with white highlights bloom from late spring through summer.

Grow in full sun to part sun and consistently moist, well-drained soil. Filtered sun is preferred in the South. Removing flowering stems after bloom may encourage another display in fall.

Growing details

• Plant type: Semi-evergreen perennial
• Mature height: 6–12 inches
• Mature spread: 1–1.5 feet
• Spacing: Approximately 1 foot apart
• Hardiness: USDA zones 4–7
• Light: Full sun to part sun; filtered sun preferred in the South
• Soil: Consistently moist and well-drained
• Flowers: Lavender-blue with white highlights
• Bloom season: Late spring through summer, with possible fall rebloom
• Foliage: Bright green, leathery and toothed

Care and garden use

This low-maintenance perennial prefers cool summers and may struggle in hotter climates above zone 7. Cut back to the basal rosettes when stem leaves begin to fade. Watch for snails, slugs, and aphids.

Use as an accent or in grouped plantings, borders, naturalized areas, wildlife gardens, woodland gardens, or containers. Pair with Shasta daisy, cottage pinks, or hibiscus where growing conditions suit each plant.

Image credits: David J. Stang, Campanula poscharskyana Blue Waterfall 1zz, CC BY-SA 4.0; (2) Arnaud 25, Jardin botanique Besançon 002, CC BY-SA 3.0; (3) Agnieszka Kwiecień, Nova, Campanula poscharskyana Dzwonek Poszarskiego 2013-06-16 02, CC BY-SA 4.0. Plants naturally vary in appearance and may differ from the images shown.