History in the United States
Common or orange daylily was introduced into the United States in the late 19th century as an ornamental. It is a very popular plant favored by homeowners and landscape designers for its showy flowers, hardiness and ability to spread. There are now over 40,000 registered cultivars, many of which likely are or have the potential to become invasive and should be watched. For example, yellow daylily (H. lilioasphodelus), has also been identified as invasive in scattered locations in the eastern U.S. Daylily buds and flowers are edible and have a sweet-spicy or peppery flavor.