There are some remarkably low tech ways to grow citrus in cold climates: https://www.lowtechmagazine.com/2020/04/fruit-trenches-cultivating-subtropical-plants-i

There are some remarkably low tech ways to grow citrus in cold climates: https://www.lowtechmagazine.com/2020/04/fruit-trenches-cultivating-subtropical-plants-in-freezing-temperatures.html https://www.lowtechmagazine.com/2020/04/fruit-trenches-culti...