Raymond Evison's Shimmer™ is a distinctive variety which features slightly rippled, deep lilac blue, each petal painted with a pastel purple central streak. As the flowers mature, they slowly fade to pale blue. The first flowers open in June and they continue coming until September.
Plant in full to part sun in cool, alkaline soil. Prune all top growth by one third late in winter to early spring. Fertilize regularly during growing season with organic fertilizer.