This article appeared on the CBC this weekend. For most of us who live in a proper winter climate, growing fresh vegetables and greens in the winter does not happen. The designer of this greenhouse claims any "cold weather" plant can be grown throughout the cold season without spending money on heating.
This design is simple and could be built with just the embedded video by any competent DIYer,
https://www.cbc.ca/player/play/2289515587938
This design is simple and could be built with just the embedded video by any competent DIYer,
https://www.cbc.ca/player/play/2289515587938