Maurice - I wondered about that. I have some that produced a scape 2 months after the initial scape. So that made me question in my zone whether most all daylilies could continue to bloom/rebloom given the right conditions. Or do some cultivars only have the initial bloom period and don't bloom again for another year.
Is there a particular fertilizer ratio that encourages scape/bloom production? I know the more fans, the more scapes.