Erodium x variabile
Erodium x variable (Cranesbill) - A perennial groundcover which grows to 6 inches tall and spreads to 2 feet. Purple flowers (also comes in white) bloom spring through fall. Performs best in part sun with moderate to occasional water. In general Erodiums prefer well-drained alkaline soils. They are nice small scale groundcovers and are great additions to a mixed container planting. Cold hardy to about 15 degrees F.