My tomato plants (don't know which species exactly) when they grow about half a meter tall begin curling inwards their bigger leaves. They're about 5 months old, isn't that too short for them to be dying already? plus I haven't even gotten any tomatoes yet. I live in Qatar which is a sunny and hot desert, perhaps that might have had an effect on the tomato plant? here is a photo of a late stage tomato who's biggest leaves seem to have nearly died, and a younger one who's just begun to have its leaves curling inward:
they both still have some green leaves which might mean it's not too late yet no?