Do I need to plant my tomatoes in a different place each year?
Alternating where you grow something is called crop rotation. Identify a full-sun spot outdoors where your tomatoes will grow. Now pick another such spot, and preferably a third, as a three-year rotation is ideal. You will need more than one area since crop rotation is a key defense against various tomato diseases that can overwinter in the soil. (No other Solanaceous cousins, no potatoes, eggplants, peppers or tomatillos, can go there in the off years, either.) I am only able to rotate every other year here, so I add lots of compost to the soil and cross my fingers.