| American Horticultural Therapy Association | http://www.ahta.org | |
| Canadian Horticultural Therapy Association | http://www.chta.ca/ | |
| Denver Botannical Garden | http://www.botanicgardens.org/ | |
| Florikan E.S.A (Environmentally Safe Agriculture) Corp. | www.plantadvice.com Information on caring for and maintaining quality plants using environmentally friendly products. |
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| Garden Forever | This site has a nice variety of articles, tips tools and resources. | |
| Harry P. Leu Gardens, Orlando, Florida | http://www.leugardens.org | |
| KSU hort therapy page | http://www.oznet.ksu.edu/horttherapy/home.htm | |
| People and Plant relationships information site - Canada | http://www.horticultural-therapy.com/ | |
| Private web Site, Practicing Hort Therapist from Texas A&M | http://aggie-horticulture.tamu.edu/horther/index.html | |
| Northeast Chapter - AHTA | http://www.neahta.org/ | |
| Skyland Trails | A HT program operating at Skyland Trails, Decatur, Georgia | |
| Troy's Tropics | Retail Nursery in Sarasota, FL - tropical trees, shrubs, vines, perennials, annuals, ground covers, water plants, etc. | |
| Universities and Colleges currently offering courses in Horticultural Therapy | http://www.ahta.org/colleges.html | |
| Virginia Tech | This website is from Virginia Tech, and according to the newsletter has lots of articles online as well as theory, research and other great links | |
| Way to Grow, Inc | Way to Grow, Inc., a company which offers the Traveling Garden, educational training, and lectures and workshops for schools and other facilities. | |