A new colour form of a classic old-time favourite. 'Black Sprite' has purple-black flowers in place of the regular royal blue. Try planting a clump of this regular blue form with 'Black Sprite' and the white-flowered 'Amethyst in Snow' for a trio of white, dark purple and blue. Nice. If plants get leggy, chop them hard to the ground and they will soon reflush.
Europe and Western Russia
Mountain woodland margins and meadows.