top of page
Image by Becca Tapert

THE HERBALIST'S COLLABORATIVE

Join our email list to receive your 20% off coupon code!

"The true herbalist is not just trained by others who heeded the same calling but is instructed by the wisdom of the natural world, a student of the plants themselves." -Sajah Popham

Join Our Community

Our next season starts October, 2025

Learn from renowned herbalist's Tammi Sweet & Kat Maier in a program designed to bridge the gap between herbal studies and becoming a confident community herbalist, all within a supportive space for growth, connection, and mentorship.

Choose Your Path 

Flexible Enrollment Options

​Whether you're ready to dive all in or take a more focused route—we've got options that meet you where you are.

Enroll in Tammi’s A&P series or Kat’s Clinical Mentorship—without joining The Herbalist's Collaborative’s full program.
→Perfect for those who want advanced teachings with a lower commitment.

 1. The Herbalist Collaborative (Full Program)
→ Best value + most immersive experience

2. Anatomy & Physiology with Tammi Sweet

→ Perfect for those wanting to strengthen their core knowledge.

​​3. Clinical Skills with Kat Maier

→ Ideal for herbalists ready to refine their practice with expert guidance.

Each path is powerful on its own—but together, they’re transformational.

Compare options below!

The Herbalist's Collaborative

$229

229

Every month

Tammi Sweet’s Anatomy & Physiology

$120

120

Every month

Clinical Mentorship with Kat Maier

$80

80

Every month

1. The Herbalist

   Collaborative

Meets weekly for six months. The Herbalist's Collaborative is an immersive intermediate-level program designed to bridge the gap between herbal studies and becoming a confident, skilled community herbalist. 

Throughout this six month journey, we meet weekly to deepen our skills and connection with plants through plant meditations, herbal energetics lessons, case studies, Tammis A&P and clinical mentorship with Kat Maier.

This peer-supported space fosters lifelong connections. Members also gain access to a private online group for ongoing support and resources.  Step into a thriving herbal community, grow your confidence as a practitioner, and fully embrace the lifestyle of an herbalist!

_edited.jpg

Rooted in community and energetic herbalism, this six month course meets weekly on Wednesdays from 10-11 AM (EST) via Zoom, and offers an interactive and mentorship-driven space where herbalists refine their skills and grow in confidence. ​ This program is for those ready to take the next step—whether deepening their clinical practice, strengthening their intuitive connection with plants, or learning to apply herbal energetics in real-world scenarios. Through plant journeying meditations, case studies, advanced herbal training with industry leaders, participants gain real-world experience and connect with a supportive community while refining their practitioner approach. ​ Key features of the Collaborative are: 1. Mentorship and guidance of Kat Maier, a leading expert in herbal energetics, who joins us monthly to help participants sharpen their clinical thinking and herbal energetic skills. 2. Lifetime access to Tammi Sweet’s Anatomy & Physiology online course plus study group where we work through the course together as well as live bi-monthly Q&A with Tammi. Additionally, members gain ongoing access to a private online community, where they can connect with peers, download exclusive resources, and continue discussions beyond our live sessions. This is more than a course—it’s a dynamic, supportive community of herbalists dedicated to growth, collaboration, and lifelong learning. ​ Required Reading: Energetic Herbalism: A Guide to Sacred Plant Traditions Integrating Elements of Vitalism, Ayurveda, and Chinese Medicine by Kat Maier. ​ Certification: Attendance at all sessions is required to receive a certificate of completion of 12 hours of practitioner development skills, 33 hours of Basic Human Sciences and 6 hours Materia Medica. ​ This is your opportunity to step into a thriving herbal community, gain confidence as a practitioner, and integrate energetic herbalism into every aspect of your work. Are you ready to take your practice to the next level and step into a thriving herbal community? Join us in The Herbalist’s Collaborative! The Collaborative meets weekly for six months via Zoom on Wednesdays at 10:00 AM. ​ Monthly format... ​ Week 1: Plant Journey Meditations with Justine Ring The first Wednesday of every month is dedicated to deepening our connection with the plants in our Materia Medica. We begin with a plant journey meditation where we use our senses, intuition and direct perception to intimately explore the plant that we are working with that month. Through this practice we are learning about plants through an intuitive and energetic lens, strengthening our sense of taste and familiarizing ourselves with the physiological effects of the five flavors. We will work with the same plant throughout the month in order to significantly strengthen our knowledge of our herbal allies. We journal, meditate, make medicine, create illustrations and anything else that inspires us to connect with the plant.   ​ Each student will receive an herb to research and present to the group. ​ Week 2: Case Studies with Amber Merkens On the second Wednesday of each month, we will practice herbal consultations through case studies explored from an energetic perspective. We will learn to use SOAP notes, a standardized method of documentation used by healthcare providers to record patient information, assessments, and care plans. Together, we will develop energetics-based protocols for clients. Members are encouraged to start offering herbal consultations to friends, family or existing clients with a goal of working with a minimum of one client per month. Each month a student will be selected to present a client's case to the group for peer review. ​ Week 3: Clinical Mentorship with Kat Maier The Collaborative gathers on the third Wednesday of the month to receive mentorship and support with clients cases and protocol development with a strong focus on energetics. ​ "Kat Maier RH, (AHG) is the founder and director of Sacred Plant Traditions, a center for herbal studies in Charlottesville, Virginia. One of her greatest accomplishments has been to train many clinical herbalists who have gone onto to begin other schools, apothecaries or open practices. In clinical practice for over 30 years, Kat teaches internationally at universities, conferences, and herbal schools. She is a founding member of Botanica Mobile Clinic, a nonprofit dedicated to providing accessible herbal medicine to local communities. This grew out of her school’s free clinic which was one of the first on the east coast and went on to be a template for other schools. She began her study of plants as a Peace Corps volunteer, and her training as a Physician’s Assistant allows her to weave the language of biomedicine into her practice of traditional energetic herbalism. She is coauthor of Bush Medicine of San Salvador Island, Bahamas. As a passionate steward of the plants, Kat also served as president of United Plant Savers and was the recipient of the organization’s first Medicinal Plant Conservation Award.”  ​ It is an honor to have Kats expertise as a seasoned and esteemed practitioner of energetic herbalism. Kat is the author of The Herbalist’s Collaboratives required reading, Energetic Herbalism: A Guide to Sacred Plant Traditions Integrating Elements of Vitalism, Ayurveda, and Chinese Medicine. Week 4: Tammi Sweets Anatomy & Physiology Online Course We will meet monthly to work through Tammi’s course together. Accountability and support is invaluable when it comes to online courses! Plus, Tammi will be with us for bi-monthly Q&A’s! "Tammi Sweet loves to teach. It’s her superpower. She has a magical ability to connect with almost anyone when teaching and help them understand complex material. For over 35 years, Tammi has shared her gift of teaching at various colleges, massage schools and herbal schools throughout the country. Her background in physiology makes her an invaluable resource to developing herbalists and massage therapists alike, who want to deepen their foundation as practitioners. In addition to her physiology expertise, Tammi is also a practitioner and teacher of herbal medicine. She is deeply influenced by her studies with accomplished herbalists, including Rosemary Gladstar, Pam Montgomery, Tom Brown, Jr. and especially Stephen Buhner’s pioneering work on the heart as an organ of perception. In 2007, Tammi set out to “combine all the things I love into one curriculum and teach whatever I wanted in ways that made sense--on my own terms.” So, she and her partner Kris Miller launched the Heartstone Center for Earth Essentials. At Heartstone, Tammi and Kris run their Herbal Apprenticeship. Tammi also offers online courses that integrate physiology and plant medicine with Tammi’s love of teaching, such as her signature course Anatomy & Physiology for Herbalists. The other branch of her teaching is Cannabis. In 2019 Tammi offered her first online course in Medicine Making with Cannabis. 2020 brought about her six month long Online Cannabis Grow course. Teaching these two courses led to publishing two books; The first; The Wholistic Healing Guide to Cannabis and her second, The Beginner’s Guide to Growing Cannabis. Tammi’s vision is for Heartstone to co-create a space with the land, where people can come "home," take refuge and find the sacred both on the land and within themselves and facilitate healing. When not teaching, Tammi loves to spend time alone and ‘recharge’ by exploring the land, writing, and hiking."

The Herbalist's Collaborative

$229

229

Every month

Get it all: 23 weeks of advanced herbal training—Anatomy & Physiology with Tammi Sweet, Clinical Mentorship with Kat Maier, Plant Meditations, Case Studies, Community & more!

Valid for 6 months

Tammi Sweet’s Anatomy & Physiology Online Course

Clinical Mentorship with Kat Maier

Energetics For Herbalists Online Program

Monthly Anatomy & Physiology Study Group

Monthly Case Studies

Monthly Plant Meditations

Supportive Community of Herbalists

Annual In Person Retreat

Certification: 12 Hours of Practitioner Skills Development

Certification: 33 hours of Basic Human Sciences

Certification: 6 hours of Materia Medica

Consent, Disclosure & Intake Forms

Protocol & Follow Up Forms

What You’ll Gain from The Herbalist’s Collaborative

  • A Sacred Space for Growth & Connection – Join a dedicated community of herbalists who come together in devotion to nature, healing, and community wisdom. This is more than a program—it’s a sanctuary for deepening your practice in energetic herbalism.

  • An Empowering & Supportive Community – Build lifelong friendships, expand your network of skilled healers, and develop a diverse referral network to support your evolving practice.

  • Hands-On Learning & Clinical Skill-Building – Gain structured mentorship, accountability, and support as you refine your practitioner skills. For those pursuing AHG recognition, this program helps you log clinical hours toward becoming a Registered Herbalist with the American Herbalists Guild.

  • Deepened Connection to Plants & Energetics – Strengthen your intuitive and clinical understanding of nature, medicinal plants, and holistic healing through immersive plant journeying meditations and energetics-based practice.

  • Guidance in Business Development – Receive expert mentorship on growing your practice, refining your offerings, and creating a sustainable business rooted in your herbal wisdom.

  • Exclusive In-Person Retreat Opportunity – As a member, you’ll have the option to attend our annual herbalist retreat, where we gather in nature to learn, connect, and recharge.

Clinical Mentorship with Kat Maier

$80

80

Every month

This option offers advanced skill development through live & interactive energetics based clinical mentorship with Kat Maier. Plus, access to The Herbalist’s Collaborative’s supportive community!

Valid for 6 months

Clinical Mentorship with Kat Maier

Supportive Community of Herbalists

Certification: 6 hours of Practitioner Skills Development

Consent, Disclosure & Intake Forms

Protocol & Follow Up Forms

Screenshot 2025-02-10 at 5.02.36 PM.png

2. Clinical Mentorship

    with Kat Maier

​Meets monthly for six months. This Clinical Mentorship is included in The Herbalist’s Collaborative (Option 1) and is also available as a standalone option for herbalists seeking mentorship without the full six-month weekly commitment.

 

Through this mentorship, you'll gain exclusive monthly access to our community and renowned herbalist and author - Kat Maier! You will gain the skills to craft effective herbal protocols for your clients while receiving expert mentorship in clinical practice and herbal energetics.

 

Learn directly from one of the industry's most respected leaders and build confidence in your practice with personalized support and community connection.

This monthly mentorship program with renowned herbalist Kat Maier offers an opportunity to refine your skills, receive expert guidance, and stay connected to a thriving herbal community—without the full commitment of the six-month program.​ Great for those who have completed a season of The Herbalist’s Collaborative and want to continue learning and being part of our community OR for those who seek for consistent support, community and resources. ​ With over 30 years of experience as both a clinical herbalist and a trained physician assistant, Kat brings a depth of knowledge that bridges traditional herbalism with modern clinical insights. Each month, she provides personalized mentorship, case study discussions, and expert advice to help you navigate real-world client cases and deepen your understanding of energetic herbalism. ​ This is an ideal opportunity for graduates of The Herbalist’s Collaborative who want to maintain a connection to the community and continue learning from one of the field’s most respected voices. It’s also perfect for herbal practitioners seeking advanced mentorship in a supportive and dynamic setting. ​ Required Reading: Energetic Herbalism by Kat Maier – the foundational text for this program. ​ Join us for expert mentorship, ongoing community, and deeper learning—one session at a time. You will join the rest of The Herbalist’s Collaborative via Zoom from 10-11 am on the third Wednesday of each month for six months.

IMG_6140_edited.jpg

3. Anatomy & Physiology

    with Tammi Sweet

​Meets monthly for six months with bonus Q&As with Tammy! Deepen your understanding of the human body—without the overwhelm.

 

If you're looking to strengthen your grasp of anatomy and physiology specifically through the lens of herbalism—but don’t want to commit to a full 6-month program—Tammi Sweet’s Online Anatomy & Physiology course is the perfect fit.

Designed for herbalists, this engaging, self-paced course offers focused, in-depth lessons that bring the human body to life. You’ll explore each system through a holistic and accurate lens, building a strong foundation that directly supports your clinical practice and confidence as an herbalist.

But what truly sets this course apart?
You won’t be doing it alone.

As a student, you’ll gain exclusive access to the Herbalist Collaborative’s live monthly study group and Q&A sessions with Tammi herself—giving you the opportunity to connect, ask questions, and integrate what you're learning with the support of an engaged herbal community.

We’ll move from the outer layers (like skin and mucous membranes) deep into the musculoskeletal, immune, endocrine, nervous, reproductive, and urinary systems, connecting the dots between structure, function, and herbal action.

Plus, earn 24 CEUs while learning at your own pace, with lifetime access and a vibrant circle of peers to learn alongside.

Tammi Sweet’s Anatomy & Physiology

$120

120

Every month

This option offers lifetime access to Tammi Sweet's A&P online course and live bi-monthly Q&A's with Tammi. Plus the opportunity to join The Herbalist’s Collaborative’s monthly study group!

Valid for 6 months

Includes monthly in person study group

& live Q&A with Tammi

Certification: 33 hours of Basic Human Sciences

Supportive Community of Herbalists

Consent, Disclosure & Intake Forms

Protocol & Follow Up Forms

When you purchase you will have access to your coursework right away. You will also have access to The Herbalist’s Collaborative study group sessions if you choose to join us! Orientation is October 1st and our Anatomy & Physiology Study Group is the 4th Wednesday of the month after that from 10am-1pm. In study group, we will work through the online course work together. Q&A’s with Tammi are not yet scheduled but will be a bi-monthly opportunity to spend time with Tammi and ask your questions. "Tammi Sweet loves to teach. It’s her superpower. She has a magical ability to connect with almost anyone when teaching and help them understand complex material. For over 35 years, Tammi has shared her gift of teaching at various colleges, massage schools and herbal schools throughout the country. Her background in physiology makes her an invaluable resource to developing herbalists and massage therapists alike, who want to deepen their foundation as practitioners. In addition to her physiology expertise, Tammi is also a practitioner and teacher of herbal medicine. She is deeply influenced by her studies with accomplished herbalists, including Rosemary Gladstar, Pam Montgomery, Tom Brown, Jr. and especially Stephen Buhner’s pioneering work on the heart as an organ of perception. In 2007, Tammi set out to “combine all the things I love into one curriculum and teach whatever I wanted in ways that made sense--on my own terms.” So, she and her partner Kris Miller launched the Heartstone Center for Earth Essentials. At Heartstone, Tammi and Kris run their Herbal Apprenticeship. Tammi also offers online courses that integrate physiology and plant medicine with Tammi’s love of teaching, such as her signature course Anatomy & Physiology for Herbalists. The other branch of her teaching is Cannabis. In 2019 Tammi offered her first online course in Medicine Making with Cannabis. 2020 brought about her six month long Online Cannabis Grow course. Teaching these two courses led to publishing two books; The first; The Wholistic Healing Guide to Cannabis and her second, The Beginner’s Guide to Growing Cannabis. Tammi’s vision is for Heartstone to co-create a space with the land, where people can come "home," take refuge and find the sacred both on the land and within themselves and facilitate healing. When not teaching, Tammi loves to spend time alone and ‘recharge’ by exploring the land, writing, and hiking."

Image by micheile henderson

Schedule 
Wednesdays at 10:00 am EST

October 2025
1st: Orientation
8th: Plant Meditation
15th: Case Study
22nd: Anatomy & Physiology
29th: Off

November 2025
5th: Plant Meditation
12th: Case Study
19th: Anatomy & Physiology
26th: Business Development Workspace

December 2025
3rd: Plant Meditation
10th: Case Study
17th: Anatomy & Physiology
24th: Holiday- off
31st: Holiday - off

January 2026
7th: Plant Meditation
14th: Case Study
21st: Anatomy & Physiology
28th: Business Development Workspace

February 2026
4th: Plant Meditation
11th: Case Study
18th: Anatomy & Physiology
25th: Bu
siness Development Workspace

March 2026
4th: Plant Meditation
11th: Case Study
19th: Anatomy & Physiology
26th: Bu
siness Development Workspace

Meet Your Mentors

Image by Annie Spratt

Tamar H.

"The Herbalists Collaborative has been a wonderful, enriching program. As an herbal educator & practitioner, I have thoroughly enjoyed the practice of herbal energetics, deepened my client formulation strategies & developed friendships & ongoing support in health & wellness education. It is an authentic model for holistic herbal health care training."

Testimonials

Aleksa K.

The Herbalists Collaborative has been a very welcoming & enriching space to build my clinical herbal practice. It was totally the missing piece in my herbal education & I'm so glad that Mary Blue told me about it! Justine gives so much of herself to make sure we are all getting the most out of each meeting. It's the right balance of laidback, informative & collaborative. Learning a lot from these folks!

Kathryn H.

The Herbalists Collaborative is a space to collaborate and share with others in a way that enhances our understanding of consultations. It is such a wonderful offering as it supports growing herbalists to build confidence, and develop their practices. It provides support for folks who want to continue to be in a learning environment while applying their herbal skills.

Bean-5.jpg

Hi! I'm Justine, founder of Healers Harvest and facilitator of The Herbalist's Collaborative.
 

I warmly invite you to join me in The Herbalist's Collaborative, where we connect deeply with plants, ourselves, and each other through an energetics-based practice of herbal medicine. This program is the next step on your path towards a career in herbalism, providing a space to put your learned skills into practice.
 

Throughout my own herbal journey, I was constantly seeking the next teacher, the next course, the next book, hoping to eventually feel ready and qualified to practice herbalism. I created The Herbalist's Collaborative to be everything I wished for after earning my first herbalism certificate many moons ago. Here, you will develop your unique offerings and gain the experience necessary to move forward with confidence, supported by a community of fellow healers. 
 

As your group facilitator, my intention is to create a safe, supportive, and growth-oriented environment where you can develop your offerings into the most authentic and fulfilling expression of yourself. I am dedicated to your growth and will be available to support you throughout the program. I am here to hold space for you as you grow and bloom.

With love,

Justine

THC Waitlist

JOIN OUR EMAIL LIST

Enrollment for The Herbalist's Collaborative opens September 1st, 2025

Our next season starts October,  2025

You are on the list! We will be in touch.

Healers Harvest is based in Native American Wampanoag lands, known as Westport, MA.

bottom of page