Herbal Schools, Academies, Workshops...
While not a complete listing of herbal schools in the US this list should get you interested in searching out what you need.
Many times a search such as 'eastern medicine' or 'finnish herbs' may be necessary. Be Creative! Find those schools and herbalists!
Columbine School of Botanical Studies
Pacific School of Herbal Medicine
The California School of Herbal Studies
Southwest School of Botanical Medicine
Northeast School of Botanical Medicine
Australasian College of Health Sciences
North America Institute of Medical Herbalism
East West Herb Course
California School of Traditional Hispanic Herbalism
Oak Valley Herb Farm
Academy of Scottish Herbalism