First made popular in Africa, keyhole gardens are catching on in Texas and other hot, dry places. Keyhole gardens hold moisture and nutrients due to an active compost pile placed in the center of a round bed. Although most helpful in hot and dry locations a keyhole garden will improve growing conditions in just about any climate.
From a bird’s eye view the garden is shaped as a keyhole. A notch is cut into a round garden bed, the notch makes for easy access to the center compost well.
Source of text and image: Inspiration Green Go there, read more, see more
I have never heard of this gardening technique before, what a wonderful idea if you have space.
Composting, irrigation and garden, all in one.