I have two tomato plants growing in 18" plastic containers. (Homestead and Heat Wave) They're growing pretty well, have two baby fruits on the Heat Wave and flowers on both. The problem is that the leaves on the older stems are curling up. There's not really any spots-just the leaves curling.
I was watering them every day when I first got them, but it rained a lot so I stopped. I started watering them again last night, but it doesn't seem to have helped any. The new leaves are fine.
I have no idea what could cause it, or if it's even an actual problem.