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This is probably a stupid question but I thought I'd ask anyway. I put 2 sweet potatoe vines into my veranda pots and when I emptied them a little while ago I found some lovely big tubers! They were the red-leaved variety. I hate wasting anything useful so I plan to eat the fruits of my pot-plants - are there any varieties that are not edible as far as you know?
I don't think they are poison, but they might not taste good. You can save your tubers and plant them again next spring. Just store in a dry, dark place that isn't extremely warm.