Tall Verbena or Brazilian Vervain is not a hardy perennial for the Mid Atlantic area, but this beautiful annual self-seeds vigorously in perennial beds. The clumps of tiny purple flowers are held on tall thin stems and make a lovely airy show from July through September. Butterflies love the late season flowers and they make a pretty addition to cut flowers because of the long clean stems. We enjoy this tough reappearing annual in our gardens year after year.