Keyhole gardening refers to a form of permaculture - specifically the use of distinctive, circular raised beds that have a central section cut out of them, giving the appearance of a keyhole.
At the centre of the cut out is a composting basket, which is integral to the design. The basket is filled with yard and kitchen waste, which decomposes and diffuses nutrients into the rest of the raised bed when watered. This, in turn, creates a microclimate, where organisms such as earthworms enhance the soil quality. The keyhole shape allows easy access to the growing surface and the central composting basket.
