I have a neighbor behind me that feeds the deer with an automatic feeder. I was afraid that would attract a bunch of deer to my garden and they would eat my daylilies. I do see slight damage now and again, and I do sometimes see deer tracks. But it appears after several years of my neighbor feeding the deer that they are content to just eat food from the feeder and that might actually be saving my daylilies. So I think it depends more on the conditions around the deer, if they get hungry I think they will eat whatever will help them survive.
I have no knowledge of any deer resistant daylily cultivars.
