Exploratorium: Science Of Gardening
- Features articles and videos on several topics, including gardening with nature, carnivorous plants, soils, fruits, and vegetables, propagation, and plant reproduction
Garden Ideas
- Articles and advice on a variety of gardening topics
Garden Terms
- Gardening dictionary with brief definitions of a large number of terms, optionally arranged by category
Hort.net
- Offers a collection of garden reference materials, including a plant gallery and profiles, archives of mailing lists, gardening news, and links
Let's Go Gardening
- General gardening site, with versions geared towards US and UK gardeners. Tips and articles, informational resources, links to events, societies, and public gardens, and a forum
LoveToKnow Garden
- Short informational articles on gardening topics, vegetables, and ornamental plants, contributed and edited by users
MyGardenGuide
- Offers plant database with photos and summary information, questions and answers on various garden topics, and a garden weblog
Ohio State University PlantFacts
- Collection of horticultural resources, including a search engine drawing from U.S. university factsheets, plant image database, how-to videos, illustrated FAQs, and glossary
Pioneer Thinking: Gardening Center
- Information and tips on outdoor and indoor gardening. Many articles grouped by topic
Yardener.com
- Lawn and garden resources for homeowners whose garden is not their hobby. Includes information and care data for many plants, shrubs, and trees, and dealing with pests and problems
| 
