1.
GardenWeb
The site includes the HortiPlex Plant Database, Searchable Calendar of Garden Events, Glossary of Botanical Terms, the Garden Web Directory and much more.
2. PLANTS Database (U.S. Department of Agriculture)
The PLANTS database focuses on the vascular and nonvascular plants of the United States and its territories. The PLANTS database includes checklists, species abstracts, distributional data, crop information, plants symbols, plant growth data, references and other plant information.
3. Plant Facts (Ohio State University)
The Plant Factsheet database provides access to over 20,000 pages of guides for answering plant-related questions from 46 different universities and government institutions across the United States and Canada.
4. Gardening Resources (Dept. of Horticulture, Cornell University)
Flowers, vegetables and fruits, lawns, pests, etc. geared for New York from the Cooperative Extension Service. Includes links to resources at Cooperative Extension Services from around the country.
5. Pests and Disease of Horticulture (Ohio State University)
A searchable database of more than 1,100 high quality images featuring pests, diseases and other problems of plants.
6. Long Island Gardening
Long Island's gardening guide. Includes information on indoor and outdoor gardening as well as monthly gardening tips.
