re: I did have a couple of those seed pods..
Don't know what you mean. There's no such thing as a tomato-potato seed pod, since the plant is a tomato plant and a potato plant grafted together.
If the plant does succeed in producing tomatoes and potatoes, the tomatoes will produce seeds as usual. If you plant them, you will get a regular tomato plant, no potatoes. The potatoes will sprout eyes as usual and if you plant them, you will get a regular potato plant, no tomatoes.
Neither tomatoes nor potatoes produce seed "pods" anyway.
Here's from the Michigan Bulb catalog:
You simply won't believe your eyes! This amazing variety actually grows Tomatoes and Potatoes from the same plant! The Tomato is the "Sub-Arctic" variety noted for its tastiness and extra-early harvest. The Potato is the "Red Pontiac", known for its good eating and storage qualities. How is it possible? Tomatoes and Potatoes are members of the same family. And this special graft captures the best of both. 2-1/4 " pot.
Also note 2 1/4 inch pot is very small. They are grafting together baby seedlings. I would think many parts of the country would have trouble getting them to produce anything within their growing season.