I wouldn't know for sure, but my best guess is that it depends on the growing conditions. I really think this one is pretty reliably nocturnal the more I think back...maybe the grower just hasn't noticed it? Or maybe they're growing something they think is Pardon Me but isn't? Or maybe if they are being grown in a shadier area, it's throwing off the daylily's schedule?... I wouldn't consider myself expert on this matter, I can only tell you that it seems pretty nocturnal to me. Since it's about to start blooming in my garden in the next week from the looks of it, I can keep a special eye out on it to see what it does this year and let you know.
