One of the hardiest perennials you could possibly find, Butterfly Milkweed will light up your garden every year. plant it once and watch it come back for many years. My patch is about 11 years old. These grow to about 18-24 inches, have deep orange blooms that are highlighted by their pretty green back-drop foliage. Suitable for mostly any soil these will light up your garden from early June and continue for about 6-8 weeks. Expect plenty of butterflies especially Monarchs. Humming birds do buzz around from time to time too!