Wild Petunia (Ruellia humilis). Herbaceous, North American perennial Description: Showy lavender to bluish, petunia-like flowers all summer and into fall Habit: Grows to 2 feet high and wide; spreading habit Culture: Prefers full sun to light shade and well-drained garden loam; drought-tolerant once established Hardiness: Cold hardy to USDA Zone 5 Origin: North America Attributes: Attracts butterflies, drought tolerant This wide-ranging wildflower is found from southern Pennsylvania west to Nebraska and... - Wild Petunia (Ruellia humilis). |