if its not in the way of something else that out performs it, then I would have tossed it years ago. but if the foliage is lush and looks good, then hang onto it. may as well if its causing no harm; other than emotional stress due to no flowers over the last dozen years! im going to assume the basics are covered here, as far as the plant is getting what it needs to bloom its best. full sun, proper fertilizing, that sort of thing... we had a daylily that took 4 years to bloom. glad we waited, but it was tough. it was only after we moved it to more alkaline soil that it began to bloom. im assuming the soil where it was located was very high in nitrogen I guess...? because the foliage was always ultra thick and it always seemed to grow faster and larger than most of our other daylilies. but no flowers. ever. until four years after planting it. I can only assume it spent all its time growing foliage due to the high concentration of nitrogen and didn't have the strength to flower...? its just a theory of mine, but now, two years later, it seems to have panned out. we give all our daylilies several doses of alfalfa meal, which is slightly alkaline, over the course of a spring/summer, and they all do great. perhaps the environmental conditions your plant is in aren't what it needs to flower...?
