Moon Ruffles daylily has light yellow flowers in early mid season. The 5½- inch flowers stay open for at least 16 hours. Moon Ruffles is a nocturnal bloomer; the flowers typically open up near sunset and close the morning of the following day. Although each flower lasts only one night, there are multiple buds on each stalk and several stalks on each plant. The buds open in series, so a single plant will continue to bloom for 2 weeks or more. It is easy to grow and does well in full sun to part shade.