A walipini is an earth-sheltered cold frame. It derives its name from the Aymaran languages. It is similar in concept to the pineapple pit that was used, as the name implies, to cultivate pineapple and other exotic fruits in Victorian era Britain and in the cold plains of pre-revolution Russia.
In the Soviet era, similar techniques were developed to grow citrus fruits (oranges, lemons, mandarins, tangerines, grapefruits, limes, pomeloes) at temperatures of minus 30 degrees Celsius. By 1950, the Soviet Union boasted 30,000 hectares of citrus plantations producing 200,000 tonnes of fruits per year.
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