- American Public Gardens Association (APGA)
- American Society of Horticultural Science (ASHS)
- BG-BASE Multisite Living Collections Searches - simultaneously search the living collections of multiple institutions
- Botanic Gardens Conservation International (BGCI) - BGCI's mission is to build and maintain a world network of botanic gardens for plant conservation.
- Center for Plant Conservation (CPC) - The mission of the CPC is to prevent the extinction of plants native to the United States.
- World Conservation Monitoring Centre (WCMC) - WCMC provides information services on conservation and sustainable use of the world's living resources.
- Children's Gardening Resources
- KidsGardening.org - Information to help kids to learn and grow through gardening
- Gardening with Kids
- BG-Map Web-VQF Searchable Sites
- Botany Links
- Botanical Society of America
- Hunt Institute for Botanical Documentation - maintains collections of books, plant images, manuscripts, portraits and data files
- Home and Hobby Gardening Sites
- Glossary of Botanical Terms - from Avas Flowers
- Composting Guide for Beginners - A useful guide from the BillyOH company in the U.K.
- Database of Plants Toxic to Pets - From the ASPCA
- Garden Safety for Dogs - From the Your Dog Advisor
- Guide to Non-Toxic Houseplants - From Gardener's Path
- DIY Gardening Projects and Landscaping Ideas to Save Money - another site for beginners
- How to Plant an Awesome Vegetable Garden - another site for beginners
- Homeowner’s Guide to a Bee-Friendly Backyard and Garden - planting for pollinators and backyard beekeeping
- The Ultimate Japanese Knotweed Guide - From the U.K.
- Successful Container Gardening - From the University of Illinois Extension
- Garden Web - Internet Gardening Community
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