Spikes of large open violet-blue flower cups June-Aug. Ht 80cm. Perennial for sun or part shade on well drained soil
Long-flowering with spikes of large open violet-blue flower cups June-Aug. Ht 70cm. Compact perennial for sun or part shade on well drained soil.
Perennial with large china-blue cupped flowers on slender stems May-July. Ht 90cm
Perennial with spikes of double light blue flower cups May-July. A strong grower. Ht 75cm
