• rec.gardens Gardening, methods and results.
• rec.gardens.orchids Growing, hybridizing, and general care of orchids.
• rec.ponds Pond issues: plants, fish, design, maintenance.
• rec.arts.bonsai Miniature trees and shrubbery.
• alt.folklore.herbs
• rec.gardens.roses Gardening information related to roses.
• alt.binaries.pictures.gardens
• rec.gardens.ecosystems Ecosystems and organic gardening. (Moderated)
• Mailing list for Gardeners
• Square Foot Gardening mail list
• rec.gardens.edible Edible gardening topics.
• Agriculture News Group
• General Horticulture Research
• Orchids News Group
• Parasitology News Groups
• Photosynthesis News Group
• Plants News Group
• Phytopathology (Plant Diseases) News Group
• Sustainable Agriculture News Group
• Austin.gardening
• aus.gardens Gardens and gardening in Australia.
• fido.ger.garten Garden Hobbyists.
• fj.rec.gardens Gardening, including potted plants and water plants.
• fl.gardening Landscaping & Gardening within Florida State (Moderated)
• hawaii.gardening Discussion of gardening in Hawai'i.
• pdaxs.services.gardening Watering, pruning, nurturing.
• triangle.gardens for the 'Triangle' region of North Carolina - Raleigh, Durham, and Chapel Hill. Zone 7.
• uk.rec.gardening To discuss gardening topics of interest in the UK.

Other newsgroups you might find interesting:

• alt.folklore.herbs. Discussion of all aspects of herbs and their uses.
• alt.sustainable.agriculture
• bionet.plants. Research into plant biology.
• sci.agriculture. Farming, agriculture and related topics.
• sci.agriculture.beekeeping. Beekeeping, bee-culture and hive products.
• sci.agriculture.fruit. Agricultural techniques for fruit, berries & nuts.
• sci.bio.botany. The scientific study of plants.

Forums
Message Forums are were you can post questions about your gardening problem or even brag about you 3 lb tomato. Much like Usenet.

The Plant Forms at virtualgarden.com
NWGarden.com Forum
Green Web's Garden Post it Board
Bonsai Web Live and Learn Forum
The Garden Web Forums
Garden Town Sage Hall
Joe & Mindy's Garden Forum
Garden Talk from Dutchbulb.Com
Delphi Gardening Forum
EX LIBRIS HERB BOARD
Garden Towns Garden Forum
The Fuchsia BBS
Ambrose Gardens - Garden Talk
The Antique Rose Advisor Forum
Canadian Gardening
The Ethnobotany Cafe Herb Exchange
Garden Chat
Another Garden Chat
The Roseraie Roundtable
The Weed Patch
Greenhouse Forum
Garden Market
Gardeners of the Golden Horseshoe Exchange Canadian
Karen's Garden Walk
Orchid Talk
Organic Gardening
Petal Searcher
Home & Garden Conference
The Hydroponics Message Board
Women's Wire has started a gardening forum
Woodside Gardens Bulletin Board
The Nature of Our Garden Message Board
Garden Web's IPM Forum
Insect Chat
Container Gardening Forum