The flowers are often fragrant and appear in every color except true white and true blue. Most blooms only last one day, but plants produce a succession of flowers during their bloom period. Early flowering varieties bloom in late spring to early summer. The greatest number of varieties bloom from early to mid summer. A third group blooms late summer to frost.
Some varieties even rebloom.
By selecting varieties with varying bloom times, gardeners can have daylilies blooming from late spring until frost. Daylilies can be propagated in two ways. The first is by seed. Seed require a moist-chilling treatment, or stratification, for successful germination. Stratification can be achieved by burying the seeds in a lightly moistened medium and placing them in the refrigerator for 6 weeks.