What is growing on my potato stems?

lindaduff53 · July 2021

Image: https://us.v-cdn.net/6030279/uploads/editor/wb/y8vyp1dygrq7.jpeg

I planted some small supermarket bought potatoes that had sprouted in a raised bed. Never grown potatoes before and was just experimenting. Really healthy looking plants and a decent size and crop of potatoes but one of the stems have strange growths on them that I can’t find out about on an internet search.
Does anyone know what they are?

Athelas · July 2021

It may be potatoes forming on the stems above ground; typically they are formed underground from stolons but the stems can also produce potatoes, possibly after injury or fungus infection (https://edepot.wur.nl/383688)

An older post shows similar photos — as @Dovefromabove mentioned, best not to eat the growths even if they are potatoes of a sort:
https://forum.gardenersworld.com/discussion/985590/strange-potato-plants

What is growing on my potato stems?

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