I had 1 tomato plant that made 4 huge tomatoes per day. I had to prop it up from sagging, it was a monster. It was great though, I made so many tomato based meals, that one plant basically fed my whole family for months. All I did was, good soil, in a pot, watering it every day, in a sunny but not burn-y location. I think that’s all plants though, and I know my advice is equivalent to “draw the rest of the owl”, but gardening really is just doing the basics very well