Article listing a number of poisonous plants, with links to further information about those plants.

Showcases new varieties of flowers, vegetables, and plants for garden performance.

Starting point for information on (types of) plants, with summary information for many species and varieties.

Features a new plant every week, with photo, description, and cultural information. Previously featured plants can be selected by botanical or common name. Focus is on plants for greenhouse culture.

Database with over 80,000 plants with cultivation information and pictures supplied by member gardeners.

This resource for gardeners in the Denver metro area includes a sizeable database of plants with photos and cultural information.

Features searchable database of thousands of plants, with basic information and often photos. Includes many succulents, herbs, and tropical fruit trees.

Describes plants that lived during the age of the dinosaurs, with brief information, lists, and links to other resources for plants of the mesozoic era.

Features cultural information, uses, handling tips, and links for an extensive list of fruits and vegetables.

Searchable database containing the results of Chicago Botanic Garden plant trials. Each entry contains a rating, photos, and cultural information.

Garden plant finder. Searchable by garden conditions and design requirements such as flower color, size and growth habit. Search results include plant photo and summary information.

Offers links to gardening websites arranged by plant type, with a brief description of each site.

Features hundreds of plant portraits, each illustrated with several photos, documenting the garden uses and cultural requirements of each species or cultivar.

Collection of hundreds of plant photos with brief descriptions. Each of the plants grows in India, but both natives and non-natives are featured.

Searchable database with basic information and some photographs of plants grown primarily for their foliage. Japanese and English.

Extensive set of fact sheets and links from the University of Florida.

Descriptions of different types of flowers suitable for small gardens. Includes Phlox, Nasturtium, Lobelia Carnation, Zinnia, Alyssum, Begonia, and Dahlia.

Weblog-style source of information on various garden plants, fruits, and vegetables. It is the English-language companion to the French aujardin.info.

Guide to growing and caring for houseplants, vegetables, trees and shrubs. Also features common pests and a miscellaneous section. From the University of Saskatchewan Extension.

Forum that allows users to upload images of plants that they are trying to identify.

Extensive directory of plants, categorized by genus, includes summary cultural information and small photograph for each plant.

Horticultural database with over 100,000 species and cultivars. Comments, ratings, and photos for many varieties supplied by members of the Gardenweb community.

Chicago Botanic Garden provides a database of recommended plants for Illinois gardens, from perennials to trees, with photos and information on their culture and use.

Database of weeds, accessible by common and botanical names and by a thumbnail gallery. Summary information and photos are provided for each weed.

Gardener Mark McDonough presents horticultural musings and illustrated plant studies, with particular emphasis on alliums and other bulbs for rock gardens.