- Permaculture Principles
- Holmgren Design Services
- Ecovillage Training Center, Summertown TN
- Earthaven
- Permaculture Net
- Permaculture Activist
- Urban Permaculture Guild
- Lost Valley Education Center, Dexter, OR
- Permaculture Research Institute (Aust)
- ERDA Institute at Djanbung Gardens Permaculture Education Centre (Aust.)
- Permaculture Institute of Northern California
- Crystal Waters (Aust.)
- Barking Frogs Permaculture Center
- Earthflow Design Work, CA
- International Institute for Ecological Agriculture, CA
- Mendocino Ecological Learning Center, CA
- Occidental Arts and Ecology Center, CA