Big, rich violet-blue flowers with silvery reverse petals rebloom through the season on a vigorous, reliable plant.
Toxic to cats and dogs. The bitter taste usually stops them before they eat much, so serious cases are uncommon.
The sap irritates skin and can raise a rash or blisters on people who react to it. Wear gloves when pruning, and wash your hands afterwards.
For gardeners who like to stay ahead.