may-September. According to the relevant public information, the day lily blooms once a year, and the flowering and fruiting period is from May to September. When it blooms, it spends a lot, and its color is mostly light yellow or orange. Day lily (Latin scientific name: HemerocalliscitrinaBaroni), also known as day lily, A Girl Without Sorrow, day lily and day lily, is a perennial herb of the genus Hemerocallis of Asphodelaceae, which originated in southern China and Japan, and is now mainly distributed in western Europe, Japan, Hebei, Shanxi, Shandong and various provinces south of Qinling Mountains in China. The root system of day lily is developed, including slender root, tuberous root and fleshy root. Basal leaves, 1~2, 2~1 cm long and 2~3 cm wide; It is a raceme or pseudostem dichotomous panicle; Pedicel less than 1 cm long; Most of the flowers are pale yellow, with more than 1 flowers at most; The fruit is a capsule, about 1.5~2. cm long, oblong and angular; Black seeds, each with 1~2 seeds.