Herb Whisperer's

East West School of Herbology

Welcome to the East West School of Herbology, serving budding and serious herbalists since 1980. Started by Michael and Lesley Tierra and operated by them until 2023, the school is now owned and run by Thomas Avery Garran, celebrated by Michael Tierra as one of his most accomplished students. While there have been and will continue to be some changes with the new ownership, the school is essentially the same, focusing on training from beginning  (the Home Herbalist Course) to advanced (the Professional Herbalist Course). We also offer a clinical herbalist track as well as ongoing free and paid lectures through our platform. If you are interested in in-person apprenticeship, see more information here.

This is our introductory course taught by experienced and respected herbalists, Lesley Tierra and Thomas Avery Garran. The course offers an introduction to herbal medicine with a focus on the basics of the ancient healing arts of China.

This is our Professional Course (36 Lessons) for those considering entering the herb profession as a practitioner or any of the other excellent opportunities that exist in the herb industry.
Online as well as printed and mailed material.

Clinical Herbalist Mentoring Program with the East West School of Herbology

Are you interested in becoming an herbalist?

We are excited to announce an upcoming course for beginners and intermediate students of herbal medicine and natural healing.

The Herb Whisperer Learning Center, led by internationally recognized herbalist Dr. Thomas Avery Garran, PhD, starts from the ground up, literally, with our extensive experience from cultivation to clinical application of medicinal plants. We offer a variety of online classes and courses, including one-on-one online mentorship, and, coming soon, in-person apprenticeship. We have chosen a team of teachers to join Dr. Garran and his more than 30 years of experience in the herbal medicine field to provide professional teaching by experienced teachers. Our classes and courses include classes for farmers, seasoned herbalists, and beginners alike.

We empower you with resources to be self-sufficient when caring for yourself and your family.

As the caretakers of the East West School of Herbology, one of the oldest and most respected schools of herbology in North America, we have decades of experience in the field, both as practitioners and as teachers and mentors to some of the most well-known herbalists in the world.

If you don’t see what you are looking for, please feel free to fill in the form below and we will contact you to let you know if, and when, we will be able to offer a class that suits your needs. We will be adding new classes and courses on a regular basis, so please join our mailing list to get updates as we add new material.


“Even more important, the support and encouragement the Michael and Lesley continue to provide their former students, particularly in relationship to being active in the AHG is excellent.”– Dr. Aviva Romm, M.D.

  • East West Herb School Clinical Herbalist (EWCH) Program Graduate
  • American Herbal Pharmacopoeia Founder & Executive Director
  • American Herbalists Guild (AHG) Co-Founder & Past President

“The direct clinical work gave me the experience of working with clients in a more formal manner and an effective mechanism for providing follow up care.”– Roy Upton, RH, DAyu

  • East West Herb School Clinical Herbalist (EWCH) Program Graduate
  • American Herbal Pharmacopoeia Founder & Executive Director
  • American Herbalists Guild (AHG) Co-Founder & Past President

“What drew me to East West was the uniqueness of the course. It is comprehensive and includes Chinese, Ayurvedic and western herbs and principles.”– Jill Ruttenberg, Registered Clinical Herbalist

  • East West Herb School Clinical Herbalist (EWCH) Program Graduate
  • AmaTierra Yoga & Wellness Director

“The credibility of graduating from the program also has great respect nationwide. I have not walked into a health food store or met an herbalist who wasn’t familiar with Michael Tierra.”

– Nicholas Schnell, Clinical Herbalist, RH, Nutritionist, RD, LMNT

  • East West Herb School Clinical Herbalist (EWCH) Program Graduate
  • Four Winds Natural Healing Center Founder, Owner, Clinical Director