You can grow tomatoes from fresh tomatoes just plant an entire slice of tomato. Slice the tomato into 1/4 inch thick slices, and plant under a layer of soil. Be sure to keep your soil moist. If you're planting indoors, you might want to cover your pot or tray with something clear that will still allow light in, but keep the moisture from getting out. In order to germinate fresh tomatoes, you prepare container make holes to have adequate drainage to keep your roots healthy. Next, fill the soil that has minerals and nutrients required for starting seedlings. You can put directly a slice of fresh tomato in the soil, gently covering them, and pour a little water to keep moist. Cover the container with a clear covering and put it in a sunny spot.