| Organization / Program Name(s) | Located In |
|---|---|
| Acton Horticultural Society | Acton |
| Bronte Horticultural Society | Oakville |
| Burlington Horticultural Society | Burlington |
| Friends of the Old Seed House Garden, Showcase Garden | Georgetown |
| Georgetown Horticultural Society | Georgetown |
| Hamilton and Burlington Rose Society | Burlington |
| Milton & District Horticultural Society | Milton |
| Oakville Horticultural Society | Oakville |
