Hi again, I guess the roots could be called a tuber but the ones I have seen over the years were very spindly . Of course weather conditions could make a difference, I have only grown them in the UK and Canada.. interesting point though. I have heard of folks lifting the roots and regrowing them a long time ago with mixed results but I don't see the point as seeds are easy to start and readily available, however I could see leaving them in the ground and letting them re grow if it gave as good a crop and quicker.
I would be very interested to har more about this.
XX Jeannine
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