Becky, since I'm not patient enough to breed my own, I've just been buying daylilies that either repeat bloom (and in FL that's usually a couple or three times since our season is so long) or are constant bloomers. That's why I bought the Siloam Double Classic - Ann
@flaflwrgrl says that it was one of the most vigorous and prolific bloomers that she had at her previous house.
I've also had for years a small red one that might have been Ming Toy. It repeated bloom at least 4 times from May through October. I've been hunting for it and I think it has finally petered out this year. The bed I had them in is right now completely invaded with oak tree roots, and until I have the energy, or can hire someone with the requisite energy, not much will grow in there unless it's in a pot sunk into the ground. Here's an older pic of that red one.