| Upper Thames Conservation Authority | |
| Urban League of London A non-profit umbrella organization for community groups in London | |
| Garden Ontario Includes info regarding local horticultural societies & Master gardeners | |
| Friends of the Coves Sub-watershed of the Thames River | |
| Nature London McIlwraith Field Naturalists of London | |
| City of London City of London’s official site. | |
| Lambeth Horticultural Society | |
| London Fanshawe Horticultural Society | |
| Ontario Horticultural Society | |
| London Middlesex Master Gardeners | |
| London Horticultural Society |
