Master Herbalist Diploma
Master Herbalist Diploma

Offering a comprehensive study of Western Herbal Medicine, including an extensive 116 herb Materia Medica and dozens of supportive herbs, the Master Herbalist diploma course is fully integrated with the study of Iridology and Healing Diets.

I have worked and done various trainings in plant medicine for 18 years, but my training with The School of Natural Medicine UK has really expanded my business and deepened my knowledge and practice of natural medicine.

Suzanna Thelwall HDNC, HMC, HHP Healing Diets Nutritional Consultant and Herbal Medicine graduate
Herbal medicine students learning how to make essential oils
Course Consists Of
Course Consists Of
  • Herbal Medicine Complete online course (Herbal Medicine, Iridology, Healing Diets)
  • Healing Diets 10 Day Immersion Training
  • Herbal Medicine 10 day Immersion Training
  • Naturopathy & Iridology 10 day Immersion Training
  • Essential Oils & Healing Touch 10 day Immersion Training
  • Quantum Botanicals & Flower Essences 10 day Immersion Training
  • Self Healing Module
  • Clinical Training

With a focus on the systemic use of herbal formula and naturopathic herbal treatments, students are taught to treat the whole person rather than using treatment protocols for specific disease conditions. This approach supports the body's own healing intelligence, and is in alignment with naturopathic principles, which are the guiding light of natural medicine.

Dr. John Christopher, Bonny's first teacher and School of Natural Medicine Patron until his passing in 1981, was a leading pioneer of herbal and natural medicine for much of the last century, and is best known for his naturopathic approach to working with herbs systemically and for integrating Western Herbal Medicine with the Native American materia medica.

Our Master Herbalist diploma course offers a complete system of herbal formula founded on these principles and created by Dr. Farida Sharan (author of Herbs of Grace). The course also provides the foundation needed for identifying, harvesting and storing herbs, and for making tinctures, salves, fomentations, poultices, ovules, distillations, etc…as well as the fundamental knowledge to create your own herbal formula. These studies are then fully integrated with in-depth study of Healing Diets and Iridology (see detailed course topics below)

If you wish to create your own herbal practice and pharmacy, heal yourself, family and friends, create herbal products, import or export individual herbs, or practice herbal medicine in a clinical or retreat setting, this course will remain a wealth of knowledge, wisdom and inspiration for years to come.

  • The Herbal Medicine Complete online studies are accredited by AADP

  • Upon graduation, students receive the Master Herbalist, Master Iridologist and Healing Diets Nutritional Consultant diplomas.

  • When students complete all modules for the Master Herbalist diploma, they also qualify as board certified Alternative Medical Practitioners with the AAMA.

Online Course Fees & Payment Options


Herbal Medicine Complete Online Course:

  • Herbal Medicine Online Course - 12 lessons - 660 pages
  • Healing Diets Online Course - 12 lessons - 540 pages
  • Iridology Online Course - 14 Lessons - 514 pages

There are two payment options:


Time Payment: 12 monthly payments of £225

Or Discounted Payment in Full: £2000

Scroll down for course topics

Immersion Training Course Fees
Healing Diets Immersion

10 day Immersion: £1600
Includes lunch

Herbal Medicine Immersion

10 day Immersion: £1350

Naturopathy & Iridology Immersion

10 day Immersion: £1350

Essential Oils & Healing Touch Immersion

10 day Immersion: £1350

Quantum Botanicals & Flower Essences Immersion

10 day Immersion: £1350

Learn more
Self Healing Module

This three month program can be undertaken at any point in your studies.

£400 plus herbs, essential oils, flower essences, etc as outlined in your individual program.

Learn more

Immersion Trainings can be undertaken in any order and at your own pace.

Each Immersion is offered on alternate years.


Course Details
  • How the body utilises water in cell, organ, gland and systemic function.
  • The effects of dehydration
  • Water fasting: history, theory and practice
  • Water quality, structure and preservation
  • Water as a container for intention
  • Juice fasting: history, theory and practice. Methods of juicing
  • Liquitarian Diets
  • Green drinks
  • Produce hygiene
  • Nutritional and medicinal properties of fruits and vegetables.
  • Disease progression: enervation, toxemia, irritation, inflammation, ulceration, induration, fungation
  • Steps to overcoming disease
  • The eliminative organs and now to support them with diet, herbs and naturopathic therapies
  • Detox symptoms and naturopathic treatments
  • Bowel cleansing: theory and practice
  • Digestive health and longevity
  • In-depth study of the digestive system and enteric nervous system
  • Liver and gallbladder cleansing: theory and practice
  • Stomach cleansing and healing
  • Nutritional support for body organs, systems and glands
  • Kidney stone cleansing and urinary system support
  • Wheatgrass, chlorophyl and Rejuvelac: benefits and use
  • Purification Diet
  • Food combining
  • Alkaline diet: effects of pH on body cells, organs, glands and systems, and on mental and emotional health
  • Minerals, vitamins, proteins, starch, fats, sugars, enzymes, antioxidants, phytonutrients pre and probiotics, life force in food, and their roles in body function
  • Diet and the immune system
  • Lymphatic cleansing
  • Diet and the nervous system
  • Transition Diets
  • Low glycemic diets
  • Healing food habits: mealtime stories, food addiction, emotional eating and other eating disorders
  • Oils and fats: raw, vegetable, nut and seed, methods of extraction, effects on health
  • Creating a healing diets kitchen: tools, cookware
  • Conscious eating: awareness, presentation, environment
  • Menu inspiration
  • Five elements: earth, water, fire, air and ether, and their relationship with diet
  • Biological humours of Vata, Pita and Kapha
  • The three Gunas and diet
  • Six tastes: sweet, sour, salty, pungent, bitter and astringent
  • Healing spices: dosha balancing and medicinal benefits of culinary spices
  • Living foods: history, benefits and practice
  • Fermented food and drinks
  • Sprouting
  • Dehydrating foods
  • Use of nuts and seeds in healing diets
  • Raw food diets: transitioning to raw, raw food preparation, nutrient density, raw challenges, raw contraindications
  • Assimilation of nutrient
  • Diets for babies and children
  • Diets for adolescence
  • Diet for preparing for pregnancy, pregnancy and nursing
  • Diet for health building and recovery
  • Supportive diets for those on medication
  • Diet for menopause
  • Diet for the elderly
  • Food and conditions for increasing beauty
  • Nutrient density for athletes
  • Food and consciousness: emotions, cognition, depression, anxiety, gut health, etc.
  • Tissue Salts
  • Parasite cleansing
  • Vegan diet: philosophy, practical application and menu inspiration
  • Health consequences of eating animal products
  • Enqironmental consequences of eating animal products
  • Social consequences of eating animal products
  • Economic consequences of eating animal products
  • Meat, dairy and egg replacers in recipes
  • Vegan and vegetarian baking
  • Food and Ethics
  • Factory farming
  • Genetically modified foods: health, environmental and economic/societal costs
  • The seed industry
  • Corporate food
  • Litigation and school lunches
  • Subsidised GMO farmers vs penalised organic farmers
  • Slave labour in the food industry
  • Codex Alimentarius
  • Food additives
  • Public Research - Private Gain: funding for food research/funding policies
  • Changing food policies
  • Food sovereignty
  • Soil and health
  • Organic farming: biodynamics and permaculture
  • Self healing and independent health
  • Creating a practice
  • Creating a consultation space
  • Practice promotion, websites and marketing
  • Practice ethics and codes of conduct
  • Consultation skills
  • Healing Diets programme creation
  • History and Philosophy
  • Use of herbs in ancient and traditional societies
  • Chemistry of herbs
  • Climate, soil, active principles
  • Collecting, harvesting, storage
  • Extraction
  • Food as Medicine
  • Food addictions
  • Effects of diet, coffee, alcohol, drugs, etc., on the healing process
  • Creating herbal formulas
  • Prescription symbols
  • Herbal pharmacy terminology
  • Contraindications for a range of situations
  • Body sysetms and herbal medicine (anatomy and physiology is taught by body system and integreated through the course
  • Materia Medica (116 primary herbs, plus dozens of supportive herbs) - action, active ingredients, activity, applications, aromatherapy, astrology, Ayurveda, cautions, contraindications, chakras, elements, emotions, Chinese medicine, combinations, cultivation, dosage, energetics, flower essences, formulas, habitat, history, homeopathy, meridians, organs, names, nutrients, part used, personality, plant description, research, spiritual properties, substitutions, systems, taste, tissues, wildcrafting and preparation.
  • Iatrogenic drug induced disease
  • Herbs and healing
  • Holistic perceptions
  • Body, mind, spirit
  • Vitamins and minerals for body organs, systems and glands
  • Botany
  • Chemistry of herbs
  • Naming and identifying plants
  • Collecting herbs and preparing herbarium specimens
  • Plant classification appendix
  • Pharmacy and dispensary
  • How to set up a pharmacy
  • Dosage
  • Methods of herbal application
  • First aid treatment
  • Acute conditions
  • Fomentations
  • Infusions
  • Ointments
  • Ovules
  • Pill making
  • Poultices
  • Smoking herbs
  • Syrups and tinctures
  • History and Philosophy of Iridology - from 1000 BC to today
  • Foundation of Natural Medicine
  • Symbolic language of the interior world
  • Iris topography
  • Embryology
  • Iris drawing
  • Iris texture
  • Basic Iris Signs
  • Eliminative channels in the iris
  • European constitutional types
  • Faridian constitutional types
  • Holistic anatomy and physiology
  • Nervous system in the iris
  • Digestive system in the iris
  • Circulatory system in the iris
  • Lymphatic system in the iris
  • Endcrine system in the iris
  • Reproductive system in the iris
  • Respiratory system in the iris
  • Urinary system in the iris
  • Skeletal and muscular systems in the iris
  • Iridian psychology
  • Rayid model
  • Flower essences, emotional healing and Iridology

Can I begin with the online studies and choose to attend Immersion at a later date for diploma training?
Yes! You are welcome to begin with online certification training and, if at a later date, you would like to continue your studies to diploma level by attending Immersion Trainings, undertaking the Self Healing module and, if applicable, attending Clinical Training, then your online studies will be applied in full towards diploma training.

How is the online study structured?
There are 12 lessons in each online course, and each lesson contains between 40 and 60 pages of detailed study material, with additional links, video and/or recommended reading, depending on the lesson.

Assignments combine reading, research and writing, with creative projects and experiential self healing. Assignments for each lesson are sent together as a group for marking and feedback. If your assignments do not reach the standard required, then you are given the opportunity to develop your work and resubmit your assignments.

How do I get help if I have a question?
Help with questions is readily available by contacting Bonny Casel by email. If the questions are more complex, then Bonny will set up a time to speak with you on Skype.

Is there a deadline for competing the course?
Most student complete their Master Herbalist studies in 3 years, however there is a 5 year window for completion for the online studies, and the immersion trainings can be undertaken at your own pace. Students may be able to apply for an extension with extenuating circumstances. If a student has not sent in an assignment in six months, the student file is placed on hold for a further six months before being closed.

Is the Master Herbalist course accredited?
Each of our courses are accredited and you can view details of accreditation on our website by following this link.

Are School of Natural Medicine UK courses accredited internationally?
Each country has its own requirements and there is no accreditation available that is ‘international.’ Most countries do not regulate the practice of natural medicine, and you can freely practice without requiring board examinations or professional memberships. Some countries do require an examination in their own language, for example in Germany there is an examination required for all practitioners who make health recommendations, regardless of your qualifications. School of Natural Medicine graduates practice all over the world and we have never had a graduate who has been unable to practice and/ or teach in their home country.

Will I be able to obtain practice insurance upon graduation?
School of Natural Medicine UK graduates can obtain discounted block insurance from Balens insurance company in the UK, or with an insurance company in your own country. Professional memberships also frequently offer reduced fee insurance options.

I have further questions about the courses. How do I reach the school?
You can reach the school directly using the contact form on our website.
To arrange a Skype call, email the school to make an appointment.
You can also arrange a time to speak with Bonny Casel by telephone. Email the school using the contact form to schedule a time.

When can I begin my studies?
As we personally mentor each student, we have open enrollment, so you can begin your studies at any time.


Immersion Trainings

Healing Diets students preparing a living foods feast
Healing Diets Immersion

The Healing Diets Immersion is a delicious, delightful, hands-on education in raw food preparation that provides the foundation for inspired, creative use of therapeutic nutrient dense foods. Students participate in establishing the rhythms of a living raw food kitchen, including sprouting and fermentation, a range of dehydrating projects, juicing, raw desserts, nut and seed milks, and much more.

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Learning how to make a herbarium at the Herbal Medicine Immersion
Herbal Medicine Immersion

The Herbal Medicine Immersion instils an authentic relationship with plant medicine in daily practice, as students explore the multi-dimensional therapeutic qualities of plants through hands-on creation of formula, tinctures, salves, distillations, infused oils, flower essences and experiential treatment with poultices, packs and foot baths.

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Students practicing healing touch with essential oils
Essential Oils & Healing Touch Immersion

The Essential Oils and Healing Touch Immersion focuses on experiential healing processes that combine essential oils with techniques to balance sympathetic and parasympathetic nervous system function and heart-brain coherence, allowing for deeper connection and receptivity to healing. In the second week, healing processes shift to the study of healing touch.

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Students learning about felt sense and flower essences
Quantum Botanicals & Flower Essences Immersion

Through lectures and experiential classes, students explore the world of plants, both physically and vibrationally, with reference to studies of plant consciousness, plant senses, the 12 windows of perception and human-plant resonance. Study flower essences, felt sense, heart-brain coherence, brain hemisphere processing, and the language of feelings and emotions.

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STudent sharing her Iridology mind map
Naturopathy & Iridology Immersion

The Naturopathy & Iridology Immersion is open to all students enrolled in a certificate or diploma course, as the content is profoundly enriching to all areas of natural medicine study and practice. Learn the fundamentals principles of naturopathy as they apply to self care, self healing and clinical practice, and explore the profound visual language of the iris.

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Healing Diets students enjoying flowers at Kew Gardens London
Self Healing Module

The Self Healing module is a core part of diploma training. Here each student has the opportunity to personally experience the complete system of natural medicine that we teach. The focus of Self Healing is direct experience of dietary changes, herbs, essential oils and flower essences, supported by lifestyle and natural therapies.

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