Description Asclepias tuberosa is a species of milkweed native to eastern North America. It is a perennial plant growing to 0.3–1 metre (1 ft 0 in–3 ft 3 in) tall, with clustered orange or yellow flowers from early summer to early fall. The leaves are spirally arranged, lanceolate, 5–12 cm long, and 2–3 cm broad. This plant favors dry, sand or gravel soil, but has also been reported on stream margins. It requires full sun. It is commonly known as butterfly weed because of the butterflies that are attracted to the plant by its color and its copious production of nectar. It is also the larval food plant of the Queen and Monarch butterflies. Hummingbirds, bees and other insects are also attracted. Propagation Most easily propagated by seed. Sown outdoors after frost, a plant will flower and produce seed in the third year. Difficult to transplant once established.