I live in Calgary, Alberta. I purchased a 1 gallon valiant grape plant and I have it growing in my unheated greenhouse. Can I leave it in the greenhouse over the winter or should I plant it outside before fall?
It should be possible, though the grape might not like it much. Grapes are used in bonsai, so growing it indoors is not out of the question. That being said, some grape we had here at the garden was being kept in the greenhouse and it started to suffer a bit until it was planted outside.
