Hi plant people! I've been growing tiny tim tomatoes in containers this year for the first time. They're starting to produce fruit but the leaves have been stiff and curling in downwards for months. I've read that curling under is a sign of over-watering but I really only water them when the first inch or so of soil feels dry. When i tried watering less, a few of the lower leaves turned yellow and brown and fell off. I cannot for the life of me figure out what i'm doing wrong or if this is just what they are supposed to look like. How can I help these lil guys?