| Auburn Horticultural Society, Auburn Memorial Hall | Central Huron |
| Barrie. Municipal Office, Barrie - 165 Ferndale Dr N, Greenhouse | Barrie |
| Barrie. Municipal Office, Barrie - 45 Cedar Pointe Dr, Enforcement Services | Barrie |
| Bayfield Garden Club | Bluewater |
| Blue Mountain Watershed Trust Foundation | Collingwood |
| Brussels & District Horticultural Society | Huron East |
| CBEAC - Civic Beautification and Environmental Awareness Committee, No Physical Address | Stratford |
| Clean Up Barrie! | Barrie |
| Hensall Horticultural Society, Mailing Address | Bluewater |
| Ontario Nature | Toronto Downtown |
| Ontario. Ministry of Natural Resources [Central East], Owen Sound, Owen Sound Field Office | Owen Sound |
| Stratford & District Horticultural Society, GardenStratford | Stratford |
| Upper Avon River Conservation Club | Perth East |