- Agriculture and Agri-Food Canada
- National Historic Site Management Plan for The Farm
- Central Experimental Farm, Agriculture and Agri-Food Canada
- Central Experimental Farm Advisory Council
- Canada Agriculture and Food Museum
- Canadensis Botanical Garden Society
- Canadian Iris Society
- Canadian Peony Society
- City of Ottawa
- Council of Heritage Organizations in Ottawa
- Fletcher Wildlife Garden
- Gardening Calendar
- Greenspace Alliance of Canada’s Capital
- International Lilac Society
- National Capital Commission
- Ottawa Field-Naturalists’ Club
- Ottawa Horticultural Society
- OttawaStart
- Ottawa Valley Rock Garden & Horticultural Society
- Summerland Ornamental Gardens
- Tour Ottawa, Ottawa Tourism and Convention Authority
- Tree Ottawa