I believe flowers are entirely optional for potatoes, at least with some varieties. Some don't flower.
I know Tom Wagner has gotten into growing potatoes from seed (not seed potatoes) which is pretty unusual in the tuber-dominated seed potato business. Most potatoes out there are hybrids and then just cloned from year to year by saving potatoes, mailing them out to gardeners and farmers, and then we plant them. But getting potatoes to come true from seed is very interesting to me as it would be possible to trade potatoes easily by mail.
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