Daylilies are put into one of three categories depending on their flower size; miniature daylilies, that have flowers that are 3 inches or less in size; small daylilies, which have flowers that are between 3 and 4 ½ inches; and Large daylilies, with flowers greater than 4 ½ inches in size.
Tetraploid daylilies, like Chicago Apache, have twice the chromosomes of a standard diploid daylily. These plants have sturdier scapes (flower stalks) and tepals (sepals and petals) than their diploid counterparts. Tetraploids also have more flower color variety than triploid or diploid daylilies.
Daylilies are native to Asia and Central Europe and were brought to North America as a hardy ornamental. While over 55,000 registered cultivars exist, no one has successfully created a cultivar with pure blue or white flowers. The current focus of many selection and hybridization programs is to develop cultivars with better hardiness and unique flower traits. With so many cultivars available, we try to stock only those cultivars that have proven themselves in our climate and soils.