Daylilies Horticulture Daylilies Daylilies are one of the most popular garden perennials. Over 32,000 varieties of daylilies are registered, and over 12,000 varieties are sold by commercial nurseries. The name accurately describes the individual flowers and their one day bloom period.
Tetraploid varieties are often bigger plants with larger flowers than diploids.
Most varieties with ruffled or frilled petals and bold colors are tetraploid. Miniatures are varieties with flowers less than 3 inches in diameter. The flowers of the daylily are borne above clumps of grass-like leaves. Flowers are borne on leafless stems called scapes. The flowers are often fragrant and appear in every color except true white and true blue.