@mariekung ahhh, 5b. up to 42 N. With that hard deep-continental climate, I'd have to have a [small] indoor winter garden with some LED growing lamps or a multi-layer glazed conservatory. doubt an unheated tunnel or glass house would help much. I have had this tab open in my browser for days, which might be inspiration: The SOLVIVA WINTER GARDEN (1983). "This 30x100' solar greenhouse, 3000 sft (just 1/14th of an acre!) proved that by incorporating warm-blooded animals, we can grow astonishing yields of highest quality food, including meat and eggs, all through the coldest below-zero F blizzards, without any back-up fuel. No need for burning.." https://www.solviva.com/post/what-is-solviva