I've noticed that my Navy Jag daylily has deep grooves all along the length of the leaves. Usually, you just see a mid vein. Also, some of the tips of the leaves are turning brown and yellow. It's planted near a large shrub. Another daylily planted 5' away looks normal. I've never seen this before. Does anyone know what is causing this?

Do you have pics to show?

Some of mine also do that, but I can't tell you why, sorry.

I have a few like that as well. Like Larry, I am clueless as to the cause. I worry more about the effects of leaf streak and rust on my foliage.