Summer-flowering perennial plants, grown for their showy flowers, commonly in shades of blue and purple, but also white and pink. They thrive in any well-drained, sunny position in the garden, or grow these beauties in containers. All flower best when the clumps become mature.
Feed in spring with Tomorite.
One of the best, deep blue flowers, very free flowering. July. Height 24-30″ (60-75cm).