Lesbian Gardens  
   Special thoughts on growing plants, various links and member information.
   http://lesbiangardens.net/

The Brown Lawn Society  
   Organization encouraging environmentally friendly methods for lawn care such as the reuse of rainwater and natural pest collectors.
   http://www.brownlawnsociety.org

The Gardeners Club  
   A directory of all local and national gardening related clubs, societies and organisations in the UK.
   http://gardenersclubsocieties.co.uk/

Canadian Botanical Conservation Network  
   A registered charitable organization which helps conserve biological diversity through networking tools and conservation programs for botanical gardens and arboreta.
   http://www.rbg.ca/cbcn/

International Code of Nomenclature for Cultivated Plants  
   An extensive list of worldwide contacts of associations organised in taxonomic order.
   http://www.ishs.org/sci/icralist/icralist.htm

The Professional Gardeners Guild  
   An organisation for gardeners employed in private gardens and estates. Based in the UK with members in European countries and the United States.
   http://www.pgg.org.uk/