Ruellia carolinensis (Native Petunia) 1-2 feet tall; bluish purple flowers from May through September. Very versatile perennial that does well in the north and the south. Needs full sun and well drained sites. Larval plant for the Common Buckeye. Malachite, White Peacock, and the Mangrove Buckeye butterflies enjoy the nectar from Native Petunia as well as leafcutter, bumble and honeybees.