Tomato and potatoes are members of the same plant family, which makes them ideal candidates for being grafted together. That’s how the company creates their new line, and a technique fruit growers and horticulturists have been using for centuries — just not in this exact combination.
Thompson-Morgan — the firm that’s claiming this is the “first time that plants have been successfully produced commercially” — grows their tomato and potato plants separately. When they’re just a few weeks old, the tomato plants are cut at the stem and placed at a cut-location on the stem of the potato plant.
Found on: Geekologie