Campanula glomerata 'Angel Bells' is a clustered bellflower with large clusters of well formed white flowers.

Campanula glomerata 'Church Bells' is a clustered bellflower with large clusters of well formed violet-blue flowers.

Campanula glomerata 'Emerald' has unique sky blue flowers with occasional darker flecks of purple-blue along the edges of the petals.

'Freya' is a mid-sized Campanula with clusters of star-shaped, lilac-purple flowers in early summer.

A clustered bellflower with an extended bloom period.

A clustered bellflower with an extended bloom period.

A clustered bellflower with an extended bloom period.

Campanula lactiflora 'Border Blues' is a special form of the milky bellflower with deep bluish purple star-like flowers.

Campanula lactiflora 'Loddon Anna' is a special form of the milky bellflower with pale pink star-like flowers.

Campanula lactiflora 'White Pouffe' is a special compact form of the milky bellflower with white flowers.

Campanula 'Kelly's Gold' is a dramatic gold-foliaged bellflower with large white flowers flushed with blue edges.

Campanula persicifolia 'La Belle' is a peachleaf bellflower double ruffled flowers in sky blue and dark green evergreen leaves.

Campanula portenschlagiana Ambella Dark Blue produces masses of starry, bell-shaped, royal violet flowers so dense you can barely see the foliage.

Campanula portenschlagiana Ambella White produces masses of starry, bell-shaped, pure white flowers so dense you can barely see the foliage.

Campanula poscharskyana Adansa Pink forms spreading mounds covered in pink, starry flowers from mid spring through summer.

Campanula poscharskyana Adansa Purple forms spreading mounds covered in bluish purple, starry flowers from mid spring through summer.

Campanula poscharskyana 'Blue Waterfall' offers masses of starry blue flowers from spring to fall.

Silvery foliage and silver pink tubular bells.

Campanula rotundifolia is a widespread harebell found throughout temperate regions of the northern hemisphere.

Campanula sibirica 'Royal Wedding' blooms in early summer with rich purple tubular flowers on tall stems.

Campanula Iridescent Bells is a floriferous bellflower with large, tubular, bell-shaped, silver blue flowers from purple buds.