Butterfly weed (Asclepias tuberosa) takes its name from the fact that it is the host plant to both Monarch and Queen butterflies. They are attracted to the bright orange flowers produced on the bush in mid-summer to early fall. Butterfly weed, a perennial plant, is easy to grow and tolerates drought. Hardy to U.S. Department of Agriculture zones 4a to 10b, the seeds require a 12-week period of cold-moist stratification. The plant forms a long taproot which does not tolerate transplanting, so it is best to start the butterfly weed seeds directly in the garden in August. It may take two to three years for the seed-started butterfly weed to produce flowers.