Keyhole Gardens

Inspiration Green

Keyhole Gardens Contact Solution Provider

Solution Overview & Benefits

'Keyhole Gardens' is a gardening method that uses locally available materials to retain moisture and nutrients by placing an active compost pile in the center of a round garden bed. Although most helpful in hot and dry locations, a Keyhole Garden will improve growing conditions in most climates. From a bird's eye view the garden is shaped like a keyhole. A notch is cut into a round garden bed, and the notch makes for easy access to the center compost pile.

The Keyhole Garden scheme: layering is proven to enhance soil health. Some layering suggestions include, from bottom to top: wood, cardboard, a bit of compost, petroleum-free newspaper, manure, worms, wood ash, straw, topsoil. Users may also repeat, compost, straw, topsoil or some such combination until desired height is reached.

History & Development

Inspiration Green is a knowledge-sharing site that promotes eco-friendly design practices.


Publicly available: yes
Countries where available: Worldwide
Price range (USD): Free
Offered or can be licensed for local manufacture: Yes

Additional Information

Solution Providers Website (external link) Product Webpage (external link)


If you are aware of any updates to the Keyhole Gardens project please complete the form or send an email to [email protected]

Need help finding solutions that respond to your unique development challenges? Apply through our Project Accelerator service or Contact us directly for needs-based project consulting.