Citrus tolerant of 0 degrees

[swincher]

It’s been discussed on here a few times, here’s where someone posted a long article about them:

Seeking Arctic Frost Satsuma in WA state - budwood, rooted cuttings, or live plants

article by Kris De Decker describing how citrus was grown in Russia without electricity, plastic, glass, or oil - Fruit Trenches: Cultivating Subtropical Plants in Freezing Temperatures [плантации-476x500] Citrus fruits (oranges, lemons, mandarins, tangerines, grapefruits, limes, pomeloes) are the highest-value fruit crop in terms of international trade. Citrus plants are not frost-hardy and can only be grown in tropical and subtropical climates – unless they are cultivated in fossil fuel he…