Maine Organic Farmers and Gardeners Association
The purpose of MOFGA, the oldest and largest state organic organization in the country, is to help farmers and gardeners grow organic food, to protect the environment, to promote stewardship of natural resources, to increase local food production, to support sustainable rural communities, and to illuminate for consumers the connections among healthful food, environmentally sound farming practices, and vital local communities.
https://www.mofga.org/
San Diego Horticultural Society
Home, Gardening, Associations, Horticulture - San Diego Horticultural Society. Promoting the enjoyment, art, knowledge and public awareness of horticulture in the San Diego.
http://sdhortsoc.org/
The Royal Horticultural Society of Ireland
The Royal Horticultural Society of Ireland is dedicated to promoting the knowledge, skill and practice of horticulture, arboriculture and floral art. The RHSI aims to encourage and to improve gardening practice throughout Ireland.
https://www.rhsi.ie/
SNA.org :: The Southern Nursery Association
Home, Gardening, Associations, Horticulture - Southern Nursery Association. This 100+ year-old trade association has assembled a great resource for horticulture in the 16 southeastern states of the U.
http://www.sna.org/
Northern Plains Botanic Garden Society
Home, Gardening, Associations, Horticulture - Northern Plains Botanic Garden Society. Working to establish a botanic garden, conservatory, and arboretum in the Fargo, North Dakota and Moorhead, Minnesota area.
https://npbgs.tripod.com/
Calgary Horticultural Society
Home, Gardening, Associations, Horticulture - Calgary Horticultural Society. Information concerning gardening and the unique climate and growing conditions of Calgary.
https://www.calhort.org/
Massachusetts Horticultural Society
Home, Gardening, Associations, Horticulture - Massachusetts Horticultural Society. Information about the society and horticulture.
https://www.masshort.org/
Canadian Organic Growers
Home, Gardening, Associations, Horticulture - Canadian Organic Growers. A national membership-based education and networking organization representing farmers, gardeners and consumers in all provinces.
https://cog.ca/