Daylilies are pretty tough and Sue is right. Daylilies do not usually die from leaf problems. The biggest mistake made is that when leaf problems occur people think brown/ yellow leaf, I need to water. They water the crown. That can cause other problems like crown rot. Try to water around the daylily. Older leaves can turn brown naturally. Also, look closely at daylily photos. Most are either close up of the flower or a garden shot from far away. If you look closely at any foliage you will find it is not perfect. The most important time to worry about bad looking foliage is in the spring. New growth emerging should look perfect. Many blessings to all!
