Dave's Garden  
   Maintain plants and seeds inventory, discuss gardening, and trade seeds and plants with fellow gardeners. Many features are only available to paying members, some also to the general public.
   http://davesgarden.com/

I Can Garden  
   Canadian gardening resource site by editor and Master Gardener, Donna Dawson. Includes a member's area, news, articles, book reviews, clubs, suppliers, pictures and links.
   http://www.icangarden.com/

SeeMeGarden  
   Community of gardening enthusiasts sharing tips, advice, experiences, and knowledge covering many aspects of gardening.
   http://www.seemegarden.com/

The Helpful Gardener: Garden Forum  
   A discussion forum for the home gardener. Members provide helpful answers for home gardening questions in a number of topics.
   http://www.helpfulgardener.com/phpBB2/

GardenWeb  
   Community of gardeners offering a wide range of resources. Forums on a large variety of general and specialized topics, glossary of botanical terms, seed exchange, and plant directory.
   http://www.gardenweb.com/

Garden Country  
   Message board for communing with other gardeners. Includes a butterfly garden guide, weed identifier, and e-cards.
   http://www.gardencountry.com/

Digital Raingardens: Gardening Questions and Answers  
   Forum for general discussion of gardening questions.
   http://www.raingardens.com/forum/index.cgi

Garden Stew  
   Discussion forums on a several gardening topics, as well as a few home improvement topics.
   http://www.gardenstew.com/

GardenWeb Australia  
   Hosts forums, garden exchanges, articles, contests and a plant database.
   http://www.au.gardenweb.com/