Strong architectural plant for back of the border. From late summer to mid-autumn, long upright spikes carry sumptuously coloured purple-blue flowers, which are held at their bases by near-black calyces. This is a vigorous plant. Will need some protection in winter. Therefore, it is ideally suited for south facing wall.Sun. 2m tall.
Spring
Summer
Autumn
Winter
Evergreen
Acid
Neutral
Alkaline
Full Light
Dappled Light
Partial Shade
Part Day Shade
Full Shade
Plant awarded RHS AGM