Board Members

Maria is a registered herbalist with more than two decades of clinical practice and 13 years as an RH bringing a variety of skill sets across her eclectic career. She currently runs Wintergreen Botanicals Herbal Clinic & Education Center in New Hampshire and online, offering beginner through advanced herbal study programs. Maria’s passion for herbalism began in college. She graduated with a degree in journalism in 1999, then ran the fact checking department and covered the herb beat at Natural Health magazine in 2000-2002, which later she left to pursue an education and career in herbalism. She intermittently worked in and ran herbal/supplement departments at local natural food stores as well as in marketing and PR in college and as she attended herb school and got her herbal career off the ground. She trained with Michael Moore at the Southwest School of Botanical Medicine, Rosemary Gladstar’s beginner and advanced programs at Sage Mountain, and with other herbalists, gaining a skill set in Euro-Western Herbalism before opening her practice. She continued to freelance herbal articles for many well-known holistic publications and edited local nonprofit and cooperative newsletters on the side during these transition years. In 2016 she pivoted from magazines to her first book, Body into Balance, now a bestseller in multiple languages and a textbook or recommended reading in several herb schools around the world. As of 2026, she has published four books with one more on the way. Her passions include holistic herbal anatomy, physiology, and pathophysiology, herbal actions, Western energetics, and nutrition. She guest teaches on herbalism for MUIH, Herbal Academy, International Herbal Symposium, Massachusetts College of Pharmacy, Green Path Herb School, and other schools, the Holistic Nursing Association, the NH Association of Naturopathic Doctors symposium, the AHG, and has been invited to teach programs on herbalism with professional CEUs for psychologists, nurses, and other medical professionals. She founded the New Hampshire Herbal Network in 2009, which is now an AHG Chapter. She ran NHHN as its president for approximately 10 years and came back later to serve a term as treasurer and support the group during a leadership transition. Maria was appointed early the American Herbalists Guild board in summer 2025 and officially began her elected term in January 2026. She was elected as the AHG board chair in October 2025 and also served as the Education and Governance committee chair roles during the board transition time.

Jeremy Riddle is a clinical herbalist, educator, and community herbalist advocate with a deep commitment to accessible, integrative care. As founder of Bound To Happen, a metaphysical bookstore and herbal remedy shop, he blends traditional healing arts with modern wellness strategies. He teaches public health, urban & wilderness lay person first responder training, & professional emergency responder training through the American Red Cross. He & his family spend their vacations establishing emergency wilderness first aid stations and local festival first aid stations integrating orthodox care and acute herbal interventions. He teaches various herbalism courses & operates a free herbal clinic in collaboration with local partners & clinical interns under his mentorship. The cornerstone of his clinical practice is synergizing the science of botanical medicine, the phytochemical interactions of herbs & their extractions, herbal medicinal actions, therapeutic applications of medicinal plants, and the energetics of plants (the woo woo).

He is a Registered Herbalist with the American Herbalists Guild and is honored and excited to serve the Guild to the best of his abilities. Jeremy has extensive nonprofit governance experience & was the Medical Director of the Gladstone CERT (Citizen Emergency Response Team) for 2 years and directed the 2020 Oregon wildfire’s refugee camp first aid response which provided critical emergency care to front line fire fighters & displaced families of the disaster.

Sallie Dixon is a practicing Herbalist living in a beautiful rural setting outside Tallahassee Florida. She began her journey of working with plants to support health and healing in 2008 after an illness called her to them. She completed the Professional Herbalist program with the East West School of Planetary Herbology centered on the traditional use of plants in various cultures including Traditional Chinese Medicine, Ayurveda as well as more recent Western methods. She continues to study with the plants and through conferences, symposiums, workshops and webinars. Her teaching focuses on ensuring students have a solid foundation in the principles and applications of the energetic systems that will be used throughout their studies. One of Sallie’s passions is helping people access tools to be more confident with their basic healthcare. Sallie was on the faculty with the East West School of Planetary Herbology. Memberships include the American Botanical Council, United Plant Savers, and Herbalists Without Borders.

I am deeply involved in supporting the American Herbalists Guild through community-centered work focused on communication, organizational clarity, and sustainable growth. Across my roles, I bring more than 15 years of business executive experience to help strengthen systems, streamline processes, and build structures that support ease, continuity, and smooth transitions over time. My work emphasizes clear communication, ethical alignment, and practical frameworks that help reduce friction and support both leadership and membership as the organization evolves. My goal in supporting the AHG Board and broader organization is to help strengthen its foundation for future transitions while remaining grounded in its mission and values, ensuring the work remains accessible, connected, and resilient.

Alongside this organizational work, I am a clinical herbalist and the founder of Boundless Herbs. My connection to plants and natural healing is lifelong, rooted in turning to herbs as a source of care, grounding, and understanding long before it became a profession. Today, my practice blends clinical training with community-based herbalism, offering personalized consultations and accessible education. Through custom formulas and community focused learning; I aim to help people move from overwhelm to understanding, making herbalism a practical tool for healing, connection, and everyday life.

Andrew Appello, DACM, MSN, L.Ac., APN, RH(AHG), is a practicing clinical herbalist, acupuncturist, and family nurse practitioner, Andrew’s journey began with a lifelong commitment to martial arts, where he first encountered the integration of traditional healing. He holds a Doctor of Acupuncture and Chinese Medicine and a Master of Science in Nursing. He significantly deepened his herbal knowledge at David Winston’s Center for Herbal Studies, where he now serves as an instructor. Additionally, he has trained with the Institute of Functional Medicine and holds an Ayurvedic Practitioner certificate from Kerala Ayurveda Academy. Andrew’s unique “East-meets-West” approach is further enhanced by his background as a nurse practitioner. He views each patient holistically, customizing natural treatments with a comprehensive understanding of various healing modalities. His dedication to teaching and continuous learning, including current studies in manual medicine at Michigan State College of Osteopathic Medicine, underscores his commitment to advancing herbal and integrative health.

Ashley Campos, RH(AHG), is both a passionate clinical herbalist and the Executive Director of the Berkeley Herbal Center (BHC), bringing a unique and holistic perspective to leadership. Her professional journey is rooted in a deep commitment to community-based herbalism, where she has cultivated a leadership style that blends administrative expertise with a hands-on dedication to the plants and the people. As a practitioner, Ashley’s herbal practice is informed by her South American lineage, inspiring her to bridge the gap between clinical herbalism and ancestral traditions. This passion for inclusivity guides her work as director, where she has overseen the BHC’s mission to create accessible, welcoming spaces through a low-cost clinic and comprehensive certification programs. This work is grounded in her core belief that we heal better in community.

Thomas Avery Garran has been studying plant medicine for over 30 years. He lived in China from 2007–2023 and received his PhD in Materia Medica studies and Plant Pharmacy at the China Academy of Chinese Medical Sciences: National Center for Materia Medica Resources and Daodi Herbs in Beijing and is the only non-Chinese recipient of this degree. He has a masters degree in Traditional Oriental Medicine and certificate in herbal medicine from the American School of Herbalism. Dr. Garran is the author of 2 books on the use of Western herbs in Chinese medicine; Western Herbs According to Traditional Chinese Medicine: A Practitioner’s Guide (2008) and Western Herbs in Chinese Medicine: Materia Medica & Methodology (2014). He is the translator (with annotation) of the first book on growing and processing daodi Chinese herbs, Chinese Herb Cultivation: Daodi Practices for Growing and Processing Chinese Herbs (2019). He has published numerous papers in peer-reviewed scientific journals, the Journal of the American Herbalist Guild, and several other journals focused on herbal medicine. Dr. Garran is the executive director of the East West School of Herbology, president of Herb Whisperer, Inc., which focuses on education and agriculture of medicinal plants. He now resides in Western Massachusetts where he and his wife are building an herbal sanctuary and educational center.