A daylily is a flowering plant in the genus Hemerocallis, a member of the family Asphodelaceae, subfamily Hemerocallidoideae. Despite the common name, it is not in fact a lily. Gardening enthusiasts and horticulturists have long bred daylily species for their attractive flowers.
Daylilies flower best when planted in full sun. In hot climates, dark-colored cultivars should receive some afternoon shade to help them retain their flower color. When planted in the correct location, daylilies will flower for years with little care.