why are the leaves on my pepper plants turning upside down?

Question

We planted our pepper plants and they were doing good for awhile. Now the leaves are turning upside down. Sign of disease?

Answer 1

Some plants will do this when rain is coming. Was the weather in your area on the verge of changing when you saw this?

Another possibility is that the leaves are not so much turning upside down, but are curling. This article will help with that:
https://www.gardeningknowhow.com/edible/vegetables/pepper/curling-leaves-on-peppers.htm