Two professional herbalist organisations are the College of Practitioner of Phytotherapy and the American Herbalists Guild
The Finnish herbalist Henrietta Kress has maintained a large website on all things herbal for a number of years. Henriette’s Herbal Homepage
Another respected herbalist with useful web resources is Chanchal Cabrera.
The American Botanical Council has provided research and backing for the medicinal use of herbs.
For businesses local to the Maryville/Knoxville area: