How to prune campanula poscharskyana

Mid to late summer, after the main flowering flush fades. Shear the plant back by one-third to a half after the first flush, cutting stems to a neat mound to encourage fresh growth and repeat blooming. In early spring remove dead or damaged growth. Trim spreading stems at any time to control spread.

Once after main flowering; trim to control spread as needed through the growing season. Campanula poscharskyana is a vigorous spreading bellflower that benefits from cutting back after flowering to keep it in check and prompt a second flush. Shear the plant over lightly once the main flush fades in summer. It can spread aggressively, so trim back stems that stray out of bounds as needed.

Shear the plant back by one-third to a half after the first flush, cutting stems to a neat mound to encourage fresh growth and repeat blooming. In early spring remove dead or damaged growth. Trim spreading stems at any time to control spread.