Q.When can potato fruits be harvested for seeds
I have 3 or 4 fruits on potato plants and would like to save the seeds and plant them next year. I live on Kodiak Island Alaska and grow potatoes in raised beds.
Certified GKH Gardening Expert
According to this extension article, it would take years for a potato grown from seed to be ready for harvest, plus it would not be like the parent plant. They don't recommend it. Only growers and breeders do it. (There is a photo that shows a ripe fruit.)
https://www.canr.msu.edu/news/what_are_those_fruit_growing_on_my_potato_plants
https://www.gardeningknowhow.com/edible/vegetables/potato/true-potato-seed-growing.htm