I have been having trouble with my "patio" tomato's. They start fine, nice and green, but as the fruit starts to come in the leaves start to turn yellow with brown edges from the bottom of the plant up. (I have a picture but can't figure out how to post/attach it.)
I have planted 3 patio plants in a 22" plastic pot using a fresh mix of potting soil, peat moss and top soil.
I water twice a week and once a week I use a tomato fertilizer.