Wisdom of the Earth’s

Level 1 Medicinal Aromatherapy Certification Course

Live In Person Course ~ TBD in 2024


Carbondale, Colorado at True Nature Healing Arts

Register Here - once dates are decided

Ready to expand your knowledge and use of essential oils?

Wanting to better utilize plant medicine for your health and healing?

Desiring to feel confident in knowing which essences to use for you, your family and friends?

If so, I invite you to join me for a deep dive into the earth’s original medicines. Learn from the ancient wisdom of the plants and trees in this ongoing exploration into healing yourself through the nurturing of the earth.
Join me for a profound journey with plant medicine in the incredibly beautiful setting of True Nature Healing Arts. We’ll discover the healing and spiritual aspects of the plants and trees throughout the gorgeous peace gardens and within the womb of the crystal-lined kiva.

These 3 days of learning about, experiencing, smelling and using over 45 essences will inspire and enlighten you, as you begin your journey as a Medicinal Aromatherapist.

This predominantly experiential class will open your heart to the plant and tree kingdom and the earth in a profoundly personal manner and will transform you.

Whether you desire to help yourself, others, or simply those closest to you, this class will give you the confidence and knowledge to use, apply, and recommend essences for physical, emotional, and spiritual healing and evolution.

No matter how much or how little experience you have with essences, this class is excellent for anyone, as we cover the basics but also explore topics and knowledge not presented in any other course.

Discover more about who you are through the ancestral teachings of the sky too. A bonus offered in my class is teaching you about your Soul’s evolutionary path through Alchemical Astrology. We’ll discuss parts of your birth chart that show aspects of what you came here to do. You’ll learn the spiritual aromatherapy essences that support your unique path and how to use them to get closer and closer to your life’s purpose. 
This course begins a journey into your heart, facilitated by nature and supported by Mother Earth. I’m here to support you in your medicinal aromatherapy journey and beyond. I will mentor you following the course, and you’ll never be left on your own as you need assistance.

The class is transcendent, spiritual, life-changing, and filled with knowledge and FUN!

I commend you for taking your health and healing back into your very capable hands and heart. I’m here to support you in your medicinal aromatherapy journey, and I will mentor you following the course as well. You’ll never be left on your own if you need assistance.

Expect to laugh, maybe cry, and walk away with a deeper understanding of yourself, your unique healing path, and plant and earth medicine.


Includes Class, Books, Essential Oils and Ongoing Mentorship

Dates TBD in 2024

Friday-Sunday – 10 AM to 4 PM

Have questions? Contact me here

wisdom of the earth essential oils

“It is the spirit of the plant, that heals the disease. The plant chemical merely gives it a form in which to travel.”

Stephen Harrod Buhner

Private Classes available anytime. Contact me above.

You will learn so much more than what you expect you might. There is so much more to the essences than the way they smell. It is much deeper than that. This class has the potential to change the way you think about everything.

LY, North Carolina

If you are looking to open your heart, mind and body to the amazing wonders of trees and plants and learn to explore more, this class is wonderful!

Alison Robbins, Florida

It was very interesting to see, touch, smell all the different essential oils. I loved how the class explained the whole process with the essences from beginning to end!

Shana Erin Kelley, Colorado

Class Schedule

  • 3 Days – Friday, Saturday, Sunday – 10am to 4pm
  • You must attend all classes live to receive your certification

Course Outline

  • What is Medicinal Aromatherapy
  • Wisdom of the Earth’s philosophy and principles
  • The Wisdom of the Earth difference
    • Including purity, non-dilution, not blending, and self-responsibility
  • How essential oils are made
  • Characteristics of plant and tree essences and medicine
  • The physical, emotional and spiritual uses of 45 essential oils
  • Experiential and written understanding of those 45 essences
  • Application methods
  • Your spiritual heart and deeper opening and listening
  • Frequency and Vibration for healing and health
  • Part of the plant used and its relation to human uses
  • Systems of the body and key essences for each
  • Quality and price considerations
  • Essences and the chakra system
  • Cultivating your intuition and trust in yourself
  • Class practice with a partner
  • Meditation and ceremony with the essences
  • Plant, tree and earth consciousness
  • Alchemical Astrology guidance to your purpose and path
  • Lots and lots of self-love and honoring of you!

You Receive

  • 45 Essential Oils to use during the class
  • Wisdom of the Earth Essential Oils Reference Guide book
  • Class slides pdf and zip file with additional handouts
  • Voices of Light, Voices of Love: Messages from the Plants and Trees book
  • Option to purchase sample aromakit of the 45 essential oils used in class at a discount
  • 20% off all essential oils for one week following the class
  • Ongoing Mentorship
  • Quarterly online mentorship meetings to answer questions, continue your education and build community with your fellow Medicinal Aromatherapists

Please Have

Pens/paper (be prepared to take notes), any food or drink you want, and something precious to you to include in the meditation circle for one of the last classes (e.g., stone, piece of jewelry, picture).

Sheridan has been the most wonderful teacher for me and my level of understanding plants and energies. She never made me feel I was asking a lame question, nor did I feel uneducated in her presence. Sheridan’s energy is the perfect compliment to the essences and Wisdom of the Earth’s philosophy. I only hope all of their students are fortunate to have such a special, loving, super educated and open teacher.

Holly Tullar, California

I loved each second of the class. Sheridan is a great teacher and all the subjects were so interesting I just wanted to learn more and more .

Sylvia T Alvarez Fernandez, Puerto Rico

Level 1 Certification Requirements

To receive certification, you must write a 5-page paper (double spaced) on an essence of your choice. You have 3 months from the date of the class to submit the paper… but we strongly recommend that you not take that long. We’ll discuss this in detail during the class, but it is like a journal entry of your personal experience, not a college research paper.

$50 Certification Fee is due when you submit your paper. Once you have submitted your paper, you are eligible for Wholesale Distributor pricing on Wisdom of the Earth essences, a 22% discount off the practitioner price. Also, you are entitled to audit future Level 1 seminars (space permitting) at no cost, but you MUST register to do so.

I think the Zoom platform is an effective way to teach. As a busy mom of 2 kids, it was so helpful for me to be able to attend from home and not spend time traveling to and from a location. It was much less stressful for me each day.

Kristen Tullar, Colorado

I really enjoyed the online format. I liked that the material was broken down into 3 hour sections as it allowed me the time to really open up to and work with each essence individually.

Sarah, Colorado

I always say that the earth saved me.

In fact, I believe it can save just about anyone, no matter what they’re going through. Growing up in Aspen, Colorado led me discover my love for the outdoors and how the human body is healed by nature. I learned firsthand the healing power of the earth as a young child hiking in the mountains to be with the trees as I recovered from trauma. My connection to the land has carried me through the most challenging times in my life.

Helping others in a deep, meaningful way to use the medicine of the earth to heal themselves has always been my calling.

As a child, time and time again, I was surprised by the ways that natural medicine could cure ailments in ways modern medicine just wasn’t able to do. My passion is teaching you to trust yourself and listen to your inner wisdom and knowing to heal yourself, coupled with the consciousness of the plants to support you.

My mission is to empower you to take your health into your own very capable hands.

Connecting with the essences of the plants and trees is the best tool for self-healing I have found. I know that working with these essences offers you healing on every level – physically, emotionally and spiritually.


By trade, I am an Alchemical Astrologer, Spiritual Aromatherapist, Holistic Health Practitioner (HHP), Clinical Aromatherapist (CCA), and Certified Nutritionist (CNC). I have worked in the holistic health field for 20 years and came to the power of aromatherapy through a traditional naturopath with whom I apprenticed 10+ years ago. My practice is based in Aspen where I embody the local motto of mind, body spirit in my healing work with clients. I work with people locally and all over the world, as well as teach ongoing classes on astrology and aromatherapy. 

Sheridan is so warm and welcoming and has so much knowledge to share. The format, order, handouts, discussion, questions and answers, personal knowledge, and everything else makes this one of the best classes ever!

Lynne Seaman, Colorado

Or have questions?



Dates TBD in 2024


Register Here - once dates are decided

I am so grateful to be able to have this experience and I really loved the zoom format! It was very personal!

Kelly, Colorado

Certification Administration Fee –

  • $50 Processing Fee is due when the Level 1 Certification paper is submitted to Sheridan Semple.

Cancellation Policy –

  • See True Nature Healing Arts policies

FREE Astrology, Alchemy, and Venus Teachings

Alchemical Astrology, Venus and the Divine Feminine, Aromatherapy and Art

alchemical astrology

Weekly, I'll send out teachings covering what's going on in the Sky with Alchemical Astrology and Venus Alchemy, along with on the Earth with Astrological Aromatherapy and Art.