Posted: 24/06/2016 at 13:51
I should think all spuds are cultivars and would not seed true
It would take more than one season of growth to get more spuds and they're not hardy so you'd have to protect the young plants through the winter. You couldn't sow seed in spring and get spuds in late summer.
Have you looked inside those little green tomatoes to see if they contain seed? If so, they would need to ripen on the plant which would interfere with the harvesting of the spuds.
Doesn't sound like a goer to me