When you look at daylilies emerging in Spring you can't help notice a big difference in appearance. This is good, clean foliage from a dormant daylily. This is one of the reasons it is important to support the development of northern hybridized dayliles. This is the cold damaged foliage from an evergreen daylily.
Some frost damage make the foliage rigid, stiif, twisted.
This foliage may slither along the ground, and sometimes it has serrated edges that look like feeding damage. Every Spring we get calls at out nusery about rabbit damage and it is always frost damage.