Just Food: Is a local, non-profit, community-based organization that works on both rural and urban food and farming issues in Ottawa and the surrounding region. The site to go for Community Garden information.
Master Gardeners of Ottawa Carleton: A group of trained volunteer Master Gardeners in the Ottawa area who offer free garden advice and help year round.
Friends of the Farm: The Friends of the Central Experimental Farm (FCEF) is a volunteer organization helping to care for the Arboretum, the Ornamental Gardens and other public areas of the Central Experimental Farm in Ottawa, Ontario, Canada.
Landscape Ontario: Find a company, find a garden style or find a plant resource plus extra links.
The Ottawa Field-Naturalists’ Club: Over 800 members participate in many aspects of the natural world, from birding to botanizing, investigation to publication, conservation to cooperation.