Lilium are apparently somewhat resistant to glyphosate (RoundUp) but can be affected by some broad-leaved herbicides - this was just a process of elimination. If it's known that nothing was used in the neighbourhood then that can be ruled out. I had also asked about other pesticides because it isn't just herbicides that can cause problems. Since there was none of the above, then you might want to look at possibly a virus (especially since they were affected last year too) or some kind of pest. Not all pests that can cause distortion and bending are present on the plant all the time, or necessarily readily visible if they are, so you may not necessarily see anything when you look. The reason I thought of pesticides, other than that it is always considered with this type of symptom, is that some leaves on the adjacent plant are also distorted. That could also apply to a pest common to both, or be two different things of course.
I don't think it is foliar nematodes, there doesn't seem to be enough browning and the stems are also affected, but just to eliminate that possibility here's an article with a picture:
http://pnwhandbooks.org/plantd...
I did notice that there is what looks like browning on a stem or two. Is that a camera effect or is there really?
Also what are the black specks on the leaves? Just trying to eliminate pests (so figure out whether that could be droppings). I thought I could see something that looked like a bug on one or two of the pictures but it's not clear and may just be a shadow or something.
None of this is intended to alarm you but when faced with an unfamiliar plant problem one needs to go through a process of elimination to see what one is left with. I'd be surprised if wet cloudy weather would do this, especially bending to one side and distortion. Cold maybe, or hail even.
