Moss Herbalism
Cassidy Moss holding a basket of fresh herbs in front of a green hedge

Clinical Herbalist Cassidy Moss

Cassidy is a clinical herbalist based in Seattle working with clients worldwide to create custom herbal wellness plans.

She combines her love of nature and gardening with her extensive knowledge of herbal medicine to provide personalized and effective herbal solutions for her clients.

The Herbarium

A Monthly Zine

Plant medicine, folklore and history, printed on paper and mailed to you every month.

  • A recipe or activity
  • A plant quiz
  • A medicinal plant profile, illustrated with a hand-carved linocut
  • Finds from the botanical archives

Cancel anytime. International subscribers add $3 for shipping.

The Herbarium Vol. 1 and its linocut plant card on moss
The HerbariumVol. 1, September 2026
Issue and plant card
Mailed to you
Cassidy pouring a tincture at a table of fresh herbs in the greenhouse

Clinical herbalism, virtual and worldwide

Work with me

Together we build an herbal wellness plan around your health history and your goals, with a custom herbal formula.

I often work with

Clinical consults

Book a consult
What happens in a consult

We review your health history, current concerns, medications and goals. You receive a written wellness plan with a custom herbal formula, plus lifestyle and diet recommendations that fit your life. Follow-up visits adjust the plan as you go.

What Clients are Saying

“She is so conscientious of the interactions of these herbs.”

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“Been working with Cassidy for the past two months in regards to my Parkinson’s. I have had more improvement in my tremors and leg pains than I have had in the past three years!! Her knowledge is off the charts. She is so conscientious of the interactions of these herbs- she has your best interest at heart!! We love her connection to the earth— this is one lady who really understands the healing power of plants and the human body. I highly recommend you reach out to her- you will not be disappointed!”

D.A.

“Cassidy took a balanced approach to help me reach my goals without relying on the rigidity and shame of an all-or-nothing mindset.”

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“Cassidy is an intuitive, empathetic listener with a brilliant mind. I booked a consultation with Cassidy several months ago, feeling burned out on the lifestyle of the modern mother. I wanted to replace pharmaceuticals with herbs in my life as much as possible. Cassidy took a balanced approach to help me reach my goals without relying on the rigidity and shame of an all-or-nothing mindset. I have made great strides towards my wellness goals and she has helped fine-tune my tincture and tea protocol over time. I am finding joy in my life again and Cassidy was a big part of my team to getting to this place. I highly recommend Cassidy’s services!”

A.L.

“She truly understands how demanding life can be and therefore provides realistic regimens to follow.”

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“Working with Cassidy is such a breath of fresh air. She truly understands how demanding life can be and therefore provides realistic regimens to follow. She knows that change is incremental and slow so she doesn’t expect you to change your lifestyle overnight in order to benefit from her services. She’s incredibly knowledgable, provides easy to follow session notes, and is a delight to be around. Cassidy makes healing a fun process and I recommend her for all your holistic herbalism needs!”

J.G.

The Moss Herbal Database

A field guide to medicinal plants

121 herbs, each with an archival botanical plate, what it does in the body, the conditions it helps, and its safety in pregnancy, while nursing and alongside medications.

  • Search 60 conditions and compare the herbs for each one side by side
  • Match herbs to your constitution
  • See the amounts, ratios and methods for every preparation
Archival botanical plate of lavenderLavenderLavandula angustifolia
One of 121 plates in The Moss Herbal Database

What is Clinical Herbalism?

Herbal medicine, also known as botanical medicine, is a holistic approach to healthcare that utilizes plants to promote healing and enhance well-being. Clinical herbalists have an education in how to work with herbs to address specific health concerns in a clinical setting. Cassidy sees a wide variety of clients and uses her research based protocols to meet individual health goals. She has a particular interest in working on mood stabilization, women’s health, pregnancy + postpartum, and fortifying detox pathways. By combining traditional wisdom and scientific knowledge she supports clients’ overall wellness through lifestyle optimization and natural and plant-based remedies.

Schedule a Consult

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