Iconic woodlanders, the flowers of this UK native first start opening from the base of the spike in early summer, but then carry on, reaching progressively higher over the following weeks. Each thimble-like pink, purple (or occassionally white) bloom has an attractively spotted throat and is a magnet to bees, which crawl right inside getting covered in pollen. If they are settled into a spot they like, they will self-seed freely, producing more plants that will flower in their second year. In a border setting, these plants can be used to add vertical interest, but they also look wonderful in generous swathes at the edges of a woodland.