It is mainly used in very dry regions or unfertile soils caused by erosion, as in Lesotho, for example.

This vegetable garden allows an important production of vegetables on a limited surface, while requiring less watering. In the central column, we pour water and drop off kitchen waste regularly. The compost formed slowly diffuses its nutrients and its moisture in the surrounding cultures.

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A flowery keyhole
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The Key Hole of the Grand Potager looks like a miniature of the garden of the Domaine de Fontenille … On this small surface, high, fed at its center by the compost of the kitchen of the restaurants of the … Read More

First plantations on the keyhole !
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Seeldings are placed all around, and mulch is placed to maintain the moisture. The kitchen peels are placed in the center and covered with dry mowing. The keyhole is watered to ease the decomposition process in the center.

Keyhole preparation
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This video shows how to prepare a key hole, using permaculture methods.  

Construction of the keyhole
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This Keyhole was made of douglas pine and metal. The metal structure maintain the vertical boards durably, like the strapping of a wine barrel. Once the structure is assembled, the interior is covered with geotextile, to retain the soil, and … Read More