Asclepias tuberosa. utterfly Milkweed is native to the central and eastern United States and is found in moderate to drier sites. Plants grow to 30 inches tall and have clusters of dark orange to reddish flowers. Butterfly milkweed is very adaptable and non-aggressive, which makes it ideal for home garden use. The plants are host to monarch butterflies and provide nectar to honey bees, wild bees and other pollinators.