I like tomatoes, lettuce and onions, I am afraid thats about it. For some of you more experienced in backyard gardening I was wondering about how many tomatoe plants I would need? For one person I mean. I like lettuce and tomatoe salads nearly every day, I think 2 "sets" of onions would be enough for me, I am unsure about how much lettuce to plant and what kind. I like leafy lettuce. Any help would be greatly appreciated. I have about 50 feet by 10 feet in which to till and plant for this.