The Professional Gardeners Guild - http://www.pgg.org.uk/ An organisation for gardeners employed in private gardens and estates. Based in the UK with members in European countries and the United States.
Canadian Botanical Conservation Network - http://www.rbg.ca/cbcn/ A registered charitable organization which helps conserve biological diversity through networking tools and conservation programs for botanical gardens and arboreta.
Lesbian Gardens - http://lesbiangardens.net/ Special thoughts on growing plants, various links and member information.
City Farmer's Urban Agriculture Notes - http://www.cityfarmer.org/ A non-profit society that promotes urban food production and environmental conservation.
The Brown Lawn Society - http://www.brownlawnsociety.org Organization encouraging environmentally friendly methods for lawn care such as the reuse of rainwater and natural pest collectors.
The Mediterranean Garden Society - http://www.mediterraneangardensociety.org/ International society for gardeners in Mediterranean climates. History, membership information, journal contents, news, and event listing.
The Garden Club of America - http://www.gcamerica.org/ Umbrella organization for US and Canadian local garden clubs. Sites lists clubs and their websites, botanical gardens, pamphlets, and position papers.
Gardeners Club - http://www.gardenersclub.co.uk/societiesinfo.asp A directory of all local and national gardening related clubs, societies and organisations in the UK.
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