There have been two daylily hybridizers in the past in or near Miami (currently zone 11a but recently 10b). The more recent one was Kaskel. The other was Jean Wooten. Kaskel registered 77 daylilies, mostly tetraploids. Wooten only registered a handful. Jean Wooten did write several articles about hybridizing in the climate of Southern Florida.
By any chance have you tried growing any of Kaskel's?
