This is a wonderfully simple little garden that anyone can build at their home or at school. A keyhole garden is a small vegetable garden built around a porous compost basket with a small access corridor so that from above it resembles an old fashioned keyhole, from the side it ought to look like a volcano.
It is very simple to make and can be made using locally available materials at very little cost to the householder. It is a simple way of encouraging households to use their organic waste materials in such a way that can help enhance their soil whilst adding vegetables to their diet to improve their health.
Compost and waste material is regularly placed in the central basket which is then watered. The nutrients are then dissipated throughout the surrounding ground. The plants that live on the slopes then feed from the rich soil.