This is a pretty clump forming plant with mid- green leaves bearing nodding reddish purple flowers from May-August. It looks very effective in the moist ground at pond and stream sides in full sun to part shade.
This is a pretty plant with dark foliage and scarlet flowers borne on tall spikes in late summer. It does well in pond edges with 10cm covering the crown in full sun to part shade. During very cold weather it would benefit from being moved to a cool greenhouse for the winter.