Anything 4 Gardening: Links to gardening resources by category, most with brief descriptions.
Backyard Garden: Links to gardening related and Iowa information.
Cold Climate Gardening: Home gardener in upstate New York presents her collection of annotated links to cold-gardening resources, as well as a regularly updated garden journal.
Cyndi's Catalog of Garden Catalogs: Provides information for over 2000 mail-order gardening companies, including descriptions, user evaluations, and web links where available.
Earth and Table: Provides annotated links to many gardening resources, mainly in the areas of organic gardening and sustainable agriculture.
Everything Green: Information center for the lawn and landscape industry, with categorized links to hundreds of companies in the green industry.
Garden Break Gardening Index: Links to gardening sites grouped by specific categories.
Garden Centers Online: Provides information about various aspects of gardening, mostly in the form of lists and tables. Also a directory of garden centers in the US.
Garden Time Online: Links to gardening resources, from planning a garden through harvest, for all types of gardens.
Gardening Places: Directory of gardening websites, including seeds, catalogs, greenhouses, tools, nurseries, flowers, vegetables, organic supplies.
Gardening Resources: Provides links to gardening sites that give information on various specialty gardening topics.
GardeningData.co.uk: Directory of practical gardening sites, tailored for the UK. Includes glossaries, general gardening information, and projects.
Horticulture on the Internet: A large collection of links to resources on the internet for specific plant groups and other gardening topics.
I Love Plants: Directory of plant and garden related topics, plus links to farmer's market lists.
La-info.com: A directory of landscape and garden resources, suppliers, manufacturers and related businesses.
Lawn & Garden Yellow Pages: Links to providers of garden products and services in the US.
Rock Gardeners' Last Resort: An index of plant and gardening databases, encyclopedias, glossaries, and dictionaries. Aimed at rock gardeners, but with many general-purpose references.
Scott's Botanical Links: Links to informational botanical sites covering a wide range of topics.
The Garden Gate: Friendly site with links to online gardening resources, and tips on using these resources to answer specific questions.
The Garden Watchdog: Clearinghouse for reader-supplied reviews and contact information of thousands of mail-order and internet plant sources.
The Gardening Launch Pad: Features organized lists of gardening sites.
Weeds on the Internet: Links to websites on weeds, weedcontrol and herbicides.