Keyhole gardens are the best idea I’ve unearthed in more than two decades of garden writing. The gardens originated more than 20 years ago in Africa, where AIDS and drought took a toll on people and gardens. Keyhole gardens combine the best of raised beds and composting, can be irrigated with gray water, and make the most of garden space.
I first learned of the gardens during a drought in Denver, and gathered materials to build one, but never got around to it because I feared the garden might appear junky in my small back yard. However, landscape architects embracing the keyhole garden concept are building these raised, typically round gardens from handsome stone that makes them an attractive highlight in any garden.
My article published by The Denver Post includes step-by-step tips for building a keyhole garden, properly siting the keyhole, and what to plant in these ingenious gardens. You may read my article at this link.