60f at night and low 80's in the daywhat are the temps? heat stress could cause these symptoms.
The big ones are folding up to and they have plenty of space so I'm thinking your right caveman.First off, pretty positive this should be in the gardening Section. But I think your problem is moisture stress on that tomato. I know every year when I start to get hot dry air my tomatos do the same thing. Try misting all the leaves with water a few times bout an hour or two apart and make sure the soil isnt super dry.
Yea that could be it too. The plant is either cupping to retain moisture or in response to too much heat. I placed the plants in a spot were there is daylight all day long and no shade so that could very well be it. I just misted them with water and placed them in a better spot that gets shade ill see how they are tomorrow.