I have one chilli plant that has wrinkled leaves. The other plants in the pot (I know, I know) appear to be fine.
It has been like this for some time now, so I think I can rule out stress. It also doesn't seem to be getting any worse, and there are no signs of infestation, so I don't think it's an insect.
I'm thinking that maybe it's just the runt of the pot. It's the smallest plant.
Updates:
- I took a small magnifying glass to the plant. Fairly sure there are no insects.
- On the smaller leaves, the edges curl down.
- Upon closer inspection of the neighbouring plants, 2 show similar symptoms on 2-3 newer leaves next to the problem plant.