Serbian bellflowers have an easy, undemanding habit. Creating a stream of lavender blue, the 1-inch-diameter star-shaped blossoms bloom reliably from late spring to early fall. The foliage remains evergreen in mild winters and needs to be sheared only once in a while to keep its appearance tidy. 'Blue Waterfall' flows beautifully along bed edges and through rock gardens in full sun to partial shade.

Bold, large, shield-shaped leaves with a deep green center and creamy-white margins turn white with age. Funnel-shaped mauve flowers borne on leafy scapes 32 inches long appear in midsummer.

A fast grower, 'Little Aurora' has cupped, puckered leaves and a metallic sheen, with soft-lavender flowers from late June into early July.

This woody-stemmed perennial produces sticky spikes of deep violet or, rarely, white to pink flowers. It blooms from early summer to autumn; reblooming is most reliable if spent flowers are deadheaded promptly. It has wrinkled leaves and forms an upright clump 3 feet tall by 1 foot wide. This salvia is most noted for its many hybirds with S. nemerosa.