I have grown 4 types of tomato this year and all are growing fine EXCEPT the St Pierre type on all 3 plants! The leaves are curling under and just don't seem right! All grown next to each other and all the rest fine!
If I would have to guess, I'd guess a heat, sunlight problem - and wilt because of that. Maybe there's a disease issue but we can hope not.
We had one of the few sunny days, yesterday. I'd left the automatic intake fan on in the greenhouse and the exhaust fan open but not running. It was 55°f by the time we got home in mid-afternoon. I knew I was in trouble. Some of the tomato leaves looked like that.
Maybe that particular type of tomato is just a little more fragile. I've found for example, that Romas and Cherry tomatoes are more robust than some other varieties I've grown. For me anyway, Rutgers, Delicious and Jubilee sometimes have a little more trouble in the pots til I get em outdoors. Tend to wilt more easily for some reason.
You'd think that this is normal but all of my plants are now doing something strange! The bottom 3 rows of leaves are fine but the top players the branches are twisting and bunching up a bit? Any advice? Started happening when I fertilised then?