Has anyone ever overwintered a squash plant?

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Last year I grew some Uchiki Kuri squash as well as my usual Waltham butternuts; this wasn't hugely successful as I didn't get a single squash flower until the last day of August! (That corner of my plot has become rather shady since the blackthorn hedge the other side of the fence grew up, and I'm not allowed to cut it back as it's in the farmer's field. Plus it was a miserable summer!) We ended up with just two small butternuts & a huge Uchiki Kuri that had to be surreptitiously hauled back over the fence. But I've just been weeding down that side, and discovered a sturdy squash plant thriving away under the nettles that hang over the fence; it's a whole lot bigger than any of my squash seedlings or indeed the ones my farmer friend was selling yesterday, and his are poly-tunnel raised. It's where the Uchiki Kuri plant was. I'm sure I didn't leave any undeveloped fruits there that could have self-seeded, and if I did some wildlife would have eaten it, so it must have come back up from the root. I've looked online and it seems that that can happen, if the root's protected from frost - which the Jerusalem Artichoke stems I left there overwinter will have done. I'm down near the south coast, and have once or twice managed to overwinter the odd runner bean root, which has come back up again & produced flowers & beans; never the whole row, just one or two, but it has happened.
So - has anyone else done this? Did the surviving plant produce anything worthwhile? I'd had other plans for that space, but if there's a plant that's happy & productive where it is, I'm inclined to let it get on with things!
So - has anyone else done this? Did the surviving plant produce anything worthwhile? I'd had other plans for that space, but if there's a plant that's happy & productive where it is, I'm inclined to let it get on with things!
Angie - GC April 23 £69/£550: 2023 Fashion on the Ration Challenge: 29/66: (Money's just a substitute for time & talent...)
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The only normal people you know are the ones you don’t know very well
Although I've never done it leaving runners in the gound seems to work, bit like dahlia tubers. I don't know if the resulting pants are bigger / stronger from having a larger root, be interesting experiment.
A physalis fruit plant in a sheltered spot in the garden has come back this year, maybe because of the mild winter.
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