Another tomato newbie/ yellowing leaves
First year growing tomatoes. We have about 15 plants and about 6 different varities. On two of them the leaves have started to yellow and curl. Same planting medium, different varieties. Our reading prior to posting has suggested overwatering. No visible bugs. If it is just overwatering, will they recover or should we just give up on them? The yellowing is more pronounced than the photo shows it to be.
Secondly, we need to build cages. What is a good average diameter for the cage?