- Boston School of Herbal Studies (Boston, MA)
- CommonWealth Holistic Herbalism (Boston, MA)
- Herbs and Aromatics (Eastern MA)
- Gaia School of Healing & Earth Education (Putney, VT)
- Herbstalk (Somerville, MA)
- Acupuncture.com - Herbal Remedies
- American Botanical Council
- American Herbal Products Association
- Botanical.com - A Modern Herbal by Mrs. M. Grieve
- Christopher Hobbs
- Green Pharmacy - Dr. Jim Duke's Botanical Desk Reference
- Henriette's Herbal
- HerbMed
- MedlinePlus: Herbal Medicine
- Sage Mountain Herbal Retreat Center & Botanical Sanctuary
- Sunnyfield Herb Farm: Matthew Wood
- Gladstar, Rosemary: Herbal Recipes for Vibrant Health
- Falconi, Dina: Earthly Bodies & Heavenly Hair: Natural and Healthy Bodycare for Every Body
- Foster, Steven and James A. Duke: Peterson Field Guide to Medicinal Plants and Herbs of Eastern and Central North America, Third Edition (Peterson Field Guides)
- Newcomb, Lawrence: Newcomb's Wildflower Guide
- Sellar, Wanda: The Directory of Essential Oils
- Asia Natural Products (San Francisco, CA)
- Healing Spirits (Avoca, NY)
- Herbalist & Alchemist (Washington, NJ)
- Jean's Greens (Schodack, NY)
- Mountain Rose Herbs (Eugene, OR)
- Mushroom Harvest (Athens, OH)
Bottles and Packaging
- Mountain Rose Herbs (Eugene, Oregon)