I do have daylilies, just a few that have survived for several years. I say 50's but with the sun out it gets to the 70's often. Depends on the overcaste situation. I think also that the dormants do better (in fact DO survive) rather than the evergreens. I didn't know the difference when I first ordered them but then finally READ the catalog. lol. I don't get tons of blooms but enough to make it worth a small patch. I think I am supposed to divide them every few years? Yes?? I hate to do it as it seems to set them back on blooms. I guess if they stop blooming I can dig them then. Not sure what I will do with all the extras though.