(Ipomoea noctiflora) Beautiful 5-6" blossoms are closed all day until sunset when the flowers open, releasing one of the most fragrant perfumes in the summer garden. Frequently visited by night pollinators. Annual in the North, perennial in milder areas. Vines 8-12' tall, if given proper support. Although frequently visited by hummingbird moths, the plants, seeds, and foliage of this variety are all poisonous—please use caution.