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For thousands of years, healers have turned to Comfrey — the original "knit-bone" — to mend what modern medicine struggles to reach. The Comfrey Cast is our most concentrated Comfrey formula: pure Kauai-grown Comfrey root, solar-dehydrated at low temperatures to preserve live enzymes, then ground into a potent healing powder.

Mix it with water, apply it to the body, and let it work. It's that simple — and that powerful.

What It Supports

  • Broken & fractured bones
  • Sprains, strains & torn ligaments
  • Swelling, bruising & inflammation
  • Joint pain, arthritis & carpal tunnel
  • Hernias, bulging discs & rotator cuff injuries
  • Dental & gum discomfort (topical application)

Why Comfrey Root

The root holds a significantly higher concentration of allantoin — Comfrey's key cell-regenerating compound — than the leaves. Our root is harvested on our Kauai farm, slow-dried in a solar dehydrator to lock in live enzymes, and ground fresh to preserve full potency.

How to Apply

Note: Comfrey powder will expand considerably when water is added

  1. Measure enough powder to cover the affected area
  2. Add water gradually and mix into a paste (thickness depends on injury size and type)
  3. Apply immediately after mixing — it must be wet to adhere properly
  4. Let air dry completely; it will set from a flexible fruit-leather texture to a firm cast depending on thickness
  5. Leave on as long as possible for best results
  6. To remove: let dry pieces crumble off, then loosen the rest with lukewarm water

⚠️ For topical use only. Do not ingest. Comfrey Cast is not an edible product and should never be made into a tea or consumed internally.

Watch & Learn

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From Our Garden: The Flora Within

What people are saying.

★★★★★

5.0 average · 6 verified reviews

Comfrey Cast
Comfrey Cast
★★★★★
Incredible product!!! This is my third or fourth purchase of comfrey cast

Incredible product!!! This is my third or fourth purchase of comfrey cast. Literally healed a broken bone!!! This is a divine product. Absolute blessing from God. I don’t trust any other farm or comfrey product!!! Kauai Farmacy is my go to for healing products, education and ingredient quality and honorable business practice, transparency and excellence in products.

— CustomerVerified

Frequently asked

Questions & answers

Is comfrey safe for topical use?

Yes. Topical comfrey applied to intact skin is well-tolerated and has been the subject of numerous clinical trials. We recommend external use only and avoid open wounds — see below.

How is your comfrey grown and harvested?

Biodynamically, on our Kauai farm. Grown without chemicals; pests are managed with healthy soil and companion planting. Harvested by hand, dried slowly, and processed on-site.

How long until I feel results?

Varies by condition. Many customers report relief within days for muscle / joint issues; deeper bone or tendon work tends to need 2–6 weeks of consistent use.

Is it pregnancy / nursing safe?

Consult your healthcare provider. We don't make claims here — comfrey's pyrrolizidine alkaloid content is a topic to raise with someone who knows your specific situation.