You can get plenty of tomatoes in a season from one plant. If you're living in an apartment and on your own, one or two plants will be lots. But if you're feeding a family, a few more would be good. It also depends upon how many tomatoes you (and your friends/family) eat. Are you going to make sauce? Gazpacho? Or just use them in sandwiches and salads?
If you plant cherry tomatoes, you might still be overwhelmed by too many little 'maters by the end of summer even with only one or two plants.
