Daylilies (Hemerocallis) are herbaceous perennials belonging to the lily family (Liliaceae). Traditional daylilies bloomed only one day each year. Some newer cultivars are reblooming daylilies, meaning they have extended or more than one blooming cycle every year.
Common reblooming daylily cultivars include Stella D’Oro, Happy Returns, Green Flutter and Mini Stella.
These reblooming daylily varieties bear flowers with ruffled petals in varying shades of yellow. Green Flutter and Mini Stella flowers feature green throats.
Stella D’Oro blooms from May through August, while the Mini Stella blooms from June through September. The Happy Returns cultivar blooms from June through October, while the Green Flutter displays flowers in June and July.
Reblooming daylily cultivars range in height from about 1 to 2 1/2 feet. Spreads typically range from 1 to 1 1/2 feet.
Most reblooming daylilies thrive in USDA hardiness zones 3 to 9. The Stella D’Oro cultivar grows well in USDA zones 3 to 10.
Reblooming daylilies grow well in perennial borders, rock gardens and containers. These flowers can also be mass planted to form ground covers.