- Cyndi's Catalog of Garden Catalogs
- Provides information for over 2000 mail-order gardening companies, including descriptions, user evaluations, and web links where available.
- 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.
- Directory of practical gardening sites, tailored for the UK. Includes glossaries, general gardening information, and projects.
- The Garden Watchdog
- Clearinghouse for reader-supplied reviews and contact information of thousands of mail-order and internet plant sources.
- UK Nurseries Online
- Nursery and gardening girectory for the UK with gardening information and a comprehensive list of (retail) nurseries.