At Farmacopia, we believe in personalized herbal medicine and nutrition AND in accessibility. Meet the skilled practitioners of our Low-Cost Herbal Clinic. Each has a different angle on your health and vitality, so read through to see who might be right for you. All practitioners make their own appointments; no one will be turned away for lack of funds.

Low-Cost Clinic Rates: $50-$75 (lower fees may be available - speak to your practitioner)

    Hilary Go, Clinical Herbalist & Nutrition Consultant

    To book a session with Hilary use her online scheduler.

    Hilary is a clinical herbalist, medicine maker and cook who is passionate about alchemy and food as medicine. She is often found in her kitchen "lab" where plants, intuition and art become one. Hilary loves to inspire simple and creative ways to integrate healing herbs and food into one’s kitchen and life.

    As a practitioner, Hilary is driven by root cause perspectives and uses tools from her interdisciplinary background of western herbalism, holistic nutrition science, and Chinese medicine to support your goals. She strives to establish an approachable plan of action with you to incorporate mindful holistic practices in your daily life. Hilary believes in healthcare that is inclusive, compassionate and empowering. She honors where you are in your health journey and offers accessible solutions to suit your unique needs.

    Inspired by the herbal soups her Chinese grandparents regularly consumed to optimize their general health, Hilary is particularly drawn to the concept of Tonifying which is unique to herbal medicine and popular in traditional Eastern medicine. She seeks to provide strategies to restore harmony and balance, as well as maintain overall wellness.

    Hilary completed her clinical herbal training at the California School of Herbal Studies and has earned a holistic nutrition consultant certification from Bauman College of Holistic Nutrition and Culinary Arts. Passionate about constantly honing and enriching her approach to providing an integrative perspective for her clients, she is currently investing in continued education in East Asian medicine, vitalist herbalism, trauma-informed care, skincare formulation, biochemistry and physiology.


    • Approachable suggestions to incorporate plants and self-care practices tailored to your lifestyle
    • Constitutional assessment based on vitalist herbalism medicine and East Asian medicine
    • Customized herbal formulations for internal use (tinctures, glycerites, teas, capsules) and/or external use (topical plant oils, ointments, creams, hydrosols)
    • Tailored dietary and supplement guidance, recipe inspiration, meal plans, and elimination diet support

    Services Offered:

    • Sleep, stress, anxiety, and depression support
    • Digestive support
    • Menstrual cycle and reproductive health support
    • Nutritional deficiency support
    • Preventative health support
    • Musculoskeletal and nerve pain support
    • Skin and wound healing support
    • Allergy support
    • Energy and adrenal support
    • Immune support

      Devin Mayhew, Clinical Herbalist

      To book a session with Devin email her here.

      Devin has the ability to hold space for her clients, allowing them to feel supported and empowered throughout their healing journey. She guides you with a grounded approach to meet you where you are at facilitating achievable, long lasting changes. She recognizes that each person is unique, personalizing formulations to support clients physically, emotionally and energetically. Devin’s enchantment with plants began at an early age. This led her on a journey to the study of science and herbal medicine. Devin completed two years of intensive training and certification at The California School of Herbal Studies, while simultaneously apprenticing with renowned herbalist Kathi Keville. She spends her free time making medicine and formulating for Sun Spell, infusing small batch topical potions and custom tincture blends. She shares her burning curiosity and passion for herbal medicine with her community and finds joy in gardening, exploring wild spaces, and hanging out with plants.

      Services Offered:

      • Custom Herbal Formulation
      • Nervous System Support, Stress & Emotional Well-being
      • Energy, Mood & Adrenal Support
      • Lifestyle Suggestions & Self Care practices
      • Supplementation Guidance
      • Pain Management Support
      • Reproductive Health Support

        Jessica Clark, Clinical Herbalist

        To book a session with Jessica, call 707.595.7895 or email

        Jessica Clark is a gardener and beekeeper with a passion for connecting people to plants. She has been working with and around plants since childhood, constantly fascinated by their diversity and inspired by their wisdom. Several years living off the grid, farming, and honing her herbal craft in a natural setting allowed her to connect deeply with nature. This connection to the Earth drives her work and her practice of helping educate people on the empowering force of herbal medicine in their daily lives. She studied holistic herbalism for 2 years at the California School of Herbal Studies in Forestville, CA, and previously as an apprentice in Donna D’terra's Yerba Women Herbal Apprenticeship in Willits, CA. Jessica enjoys cooking, making medicine, hiking, and working in the garden in her free time. She is also involved in a free mobile clinic project, Bay Herbalism, which provides access to natural health care to under-served populations.

        As a practitioner, Jessica trusts in the innate process of healing inherent in each person, cultivating this gift with her clients. Through the intake process, she investigates the root causes of the "dis-ease," and works with them to craft a plan for renewal. She believes that each person is not their set of discomforts, but a complex whole being comprised of body, mind, spirit, and soul having a unique experience. She recognizes that each symptom is part of a language which the body uses to try to communicate its needs. Actively tuning in to what the body is trying to say, she creates unique herbal formulas for clients, along with a road map of lifestyle adjustments, self care practices, personal reflections, and appropriate supplementation.

        Drawing upon Traditional Western Herbalism, the wisdom of the plants, constitutional theories from various traditions, the language of energetics, pulse and tongue analysis, modern science and her own intuition, Jessica meets clients where they are, providing attainable steps in their process of healing. She works with each person to create a realistic plan, aiding them in their own self-healing, allowing them to take charge of their personal health journey.

        Services Offered:

        • Active Listening and Dialoguing with Clients
        • Herbal Formulation
        • Lifestyle Suggestions
        • Self-Care Practices
        • Healthy Eating Evaluations and Nutritional Insights
        • Flower Essence support
        • Supplementation Guidance
        • Education on creating one's own herbal preparations
        • On-Going Support

          Isabella De Credico, Clinical Herbalist & Medicine Maker

          To book a session with Isabella, email

          Herbal consultations with Isabella offer individualized care based on your goals within wellness. Whether you are seeking preventative care or are already experiencing symptoms, consultations offer you one-on-one customized support.

          Isabella will work with you wherever you currently are physically, emotionally, spiritually, and financially in your healing process as well as compassionately encouraging growth and self-empowerment.

          Her work is infused with her experiences throughout life and her lineage as well as the tools she has learned from both formal and informal education. She holds a BA in Communication and an emphasis in Ecological and Educational Gardening from the University of California, Davis. She has completed two years of training at the California School of Herbal Studies where she also apprenticed in the garden during her time as a student. Isabella has also taken workshops in Meditation, Anti-Racism and Herbalism, Traditional Chinese Medicine, Elemental Intuition, Foundations of Rituals, and Alchemy. She is forever a student of the magical, ancestral, and scientific world of herbs.

          For more information or to book an appointment:

          Services Offered:

          • Stress Management & Emotional Wellness
          • Nervous System Support
          • Energy, Mood, & Adrenal Support
          • Sleep Wellness
          • Reproductive Health
          • Skin Health (Acne, Rosacea, Psoriasis, Dermatitis)
          • Allergy Support
          • Digestive Support
          • Pain Management Support

          Tools Used:

          • Constitutional observations & assessments
          • Custom herbal formulas
          • Dietary and Nutritional support
          • Elimination Diet Support
          • Supplementation guidance
          • Lifestyle Recommendations & Rituals
          • Self-Care practices
          • Flower Essences

          Ashley Hall, Clinical Herbalist - not currently accepting clients

          To book a session with Ashley, call 314-283-6801 or email

          In our fast-paced modern society, it is all too easy to get in a funk, feel under-the-weather, or fall out of balance with our health. In fact, it is quite normal. Ashley is a deeply nurturing and compassionate health enthusiast devoted to helping her clients reach their wellness goals. She is a true emotional intuit and creates a safe and inviting space for sharing the challenges of life and the challenges of our health. By taking into consideration client-health concerns and whole-body needs, Ashley will offer practical and attainable health recommendations that meet her clients where they are at in their health journey. Her practice offers a personalized wellness plan with custom herbal formulations, dietary suggestions, and self-care/life-routine practices that supports the body’s innate capacity to heal.

          Ashley's love for the natural world started at an early age, leading her to attain a B.S. in Environmental Soil Science from the University of Missouri. Upon moving to Sonoma County, she pursued a two-year intensive in herbalism at the California School of Herbal Studies. In the latter year, she dove deeply into the world of clinical herbal medicine therapeutics. From here, she studied clinical ayurvedic medicine at the dhyana Center where she completed the Ayurvedic Clinical Foundations Program. Currently, Ashley is in the process of becoming a Registered Nurse. Her hope is to become a Holistic Nurse Practitioner with the aspiration of providing accessible, integrative, and holistic health care in our more conventional medical system.

          There is nothing that brings Ashley more joy than helping people on their path to wellness! She would be honored to work with you on your health concerns.

          Services & Tools Offered:

          • Custom Herbal Formulations
          • Constitutional Analysis based on Western Herbal Medicine and Ayurvedic Perspectives
          • Dietary Suggestions, Nourishing Meal Plans, and Elimination Diet Support
          • Stress Management, Emotional Wellness, and Nervous System Support
          • Energy, Mood, and Adrenal Health Support
          • Reproductive Health Support
          • Supplementation Support