Jerusalem Artichoke, Helianthus tuberosus, is a type of sunflower native to Eastern North America but now widespread throughout the continent. Jerusalem artichoke is a perennial sunflower typically grown for both its attractive flowers and its edible tubers. The plant grows 6 to 10 feet tall and prefers average moisture and full sun. Medium-sized flowers bloom in late summer to early fall. Seed heads are highly attractive to birds, such as goldfinches. Jerusalem Artichoke tends to spread aggressively so is best planted in a dedicated site, where it will not encroach on other plantings.