One of my favorite foliage perennials is unquestionably Aristolochia fimbriata. While the flowers are insanely cool and produced all summer, the foliage is just so hard to beat. Even where it isn’t winter hardy, Aristolochia fimbriata makes a great summer container spiller, sprawling to about 2′ in width. Here’s how it looks in the garden today. See the top 25 flowers that attract butterflies here.