All daylily foliage turns brown after the blooming is done. The best thing to do is cut it all down and let fresh green shoots come up. They look much much better, and the plant is fine. You might want to reconsider keeping those orange roadside daylilies though. They are invasive exotics, which means they do not provide any food for native insects, which means no food for birds. Then again, that’s probably true for all daylilies. However, yesterday I discovered a praying mantis lurking in my fancy daylilies, which was rather nice.