Verbena lasiostachys - Western Vervain

Evergreen perennial to 2-3 ft tall by 3-4 ft wide. Fast growing pioneer species. Light purple flowers throughout spring and summer. Highly attractive to butterflies. Good for erosion control. Grows well in containers. Full sun to part shade. Moderate to high water. Can spread aggressively in wet areas. Tolerates many soil types. Hardy to -20°F.