Late and reblooming daylilies can survive a light frost, but cold and shorter days produce smaller, paler flowers.
Vermont River Promenade, mid-October
Showmanship, mid-October
Like iris and gladiolas, daylilies will continue to bloom indoors, each bloom for only one day, however. Cutting stems with reasonably mature buds before a frost is another way to prolong your enjoyment of these wonderful flowers.
A shower of blossoms from Vermont River Promenade and one (in the back) from rebloomer Angel Baby