Violet–blue flowers with paler midribs and a striking, creamy yellow center will attract attention in the garden. Its semi–double flowers open in late spring, followed by single flowers in late summer. It reblooms well after trimming, too. In the fall, its silky seed heads create plenty of off–season interest. This is a medium–size vine great for trellises, obelisks, shrubs and other medium structures—or send it crawling along a perennial bed.