The soviet's probably would have liked this man's geothermal greenhouse which is a modern version of their trenches: https://www.youtube.com/watch?v=IZghkt5m1uY

The soviet's probably would have liked this man's geothermal greenhouse which is a modern version of their trenches: https://www.youtube.com/watch?v=IZghkt5m1uY https://www.youtube.com/watch?v=IZghkt5m1uY Also, I'm wondering if the citrus grown in Russia ended up ripening in fall rather than in winter or whether they had to harvest the fruit in the middle of the winter. Also, I'm not sure how citrus would work being dug up every winter. Did these trees ripen in the spring? This is all fascinating and something I'd love to try in the US. I'd bet the premium on locally grown foods isn't enough to sustain a northern citrus farm, but it could be a good hobby.