A well known plant from olden days. Ideally put at the back of a border, where its dark blue flower spikes with their white centres will be spectacular. Needs some support. Height 150 cm. Spread 60 cm.
Often grown as an architectural plant for its shapely leaves, the dark blue flowerheads in summer will attract many butterflies and bees to your border, Height 100 cm. Spread 45 cm.
