A Walipini is an underground green house. Some of these videos demonstrate zero degrees outside and 70 degrees in the green house. Over heating seems to be more of a problem, but simply opening a vent is all that is required. Year around gardening of out of season crops!
CLICK THE TITLE "Walipini (playlist)" to play an entire YouTube playlist
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CLICK THE TITLE "Walipini (playlist)" to play an entire YouTube playlist
