Asclepias incarnata. Hardy perennial.
Swamp milkweed, also known as rose milkweed, is native to most of the continental U.S. and Eastern Canada. Its vanilla-scented, vibrant pink blossom clusters will bloom all summer. Swamp milkweed serves both as a host plant and nectar source for Monarch butterflies, and attracts hummingbirds, honey bees, and many other pollinators.