This is question I've been wondering for a while, but at what temperature do you find sweet potatoes stop any meaningful tuber growth, and therefore may as well be harvested?
For the past three years, I've been growing them in pots in my conservatory. All the stuff I read says for crops outdoors, dig up when the leaves are touched by frost, and for crops under cover, harvest when the vines start to yellow and die back.
Problem is, that has never yet happened. The vines always remain green and healthy. Year before last, I got bored of waiting and harvested them in early December, and the leaves where still green and healthy.
They're a sub-tropical crop, though, so even if they survive in cooler temperatures, there must surely be a point where it is too cold for them to really grow much, even if it is not cold enough to kill them (and my conservatory can get pretty chilly in the winter, although it never freezes).
So what is that point?
For the past three years, I've been growing them in pots in my conservatory. All the stuff I read says for crops outdoors, dig up when the leaves are touched by frost, and for crops under cover, harvest when the vines start to yellow and die back.
Problem is, that has never yet happened. The vines always remain green and healthy. Year before last, I got bored of waiting and harvested them in early December, and the leaves where still green and healthy.
They're a sub-tropical crop, though, so even if they survive in cooler temperatures, there must surely be a point where it is too cold for them to really grow much, even if it is not cold enough to kill them (and my conservatory can get pretty chilly in the winter, although it never freezes).
So what is that point?
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