Cold weather is coming up, and I was wondering if it was feasible to try and grow vegetables in pots for the winter season. I've seen those tomato growers that you can supposedly hang up or put on the wall, but I don't know if those work outside of infomercials. I can't see carrots doing well in a pot, but what about lettuce, perhaps? Has anyone tried this and can give me some tips on what to grow? Thanks!