The Registered Herbalist (RH) credential from the American Herbalists Guild is aimed at practising clinical herbalists. It is earned through a peer-reviewed application with 3 case histories rather than a written exam. This page summarises the application steps, fees and timing, and offers free practice sets on botany, formulation, safety and ethics to sharpen the knowledge behind your cases.
The RH has 3 questions and costs $175[1] (American Herbalists Guild, verified Oct 26, 2026).
Numbers in brackets link to the official sources listed under Sources & last verified. Dates that have passed are removed automatically.
| Item | Detail | Source · Verified |
|---|---|---|
| Number of questions | Peer-reviewed application with 3 case histories, no exam[1] | American Herbalists Guild · Oct 26, 2026 |
| Time limit | No time limit to complete Part 1 or Part 2[1] | American Herbalists Guild · Oct 26, 2026 |
| Exam fee | $100 members / $175 non-members (Part 2, non-refundable); Part 1 free[1] | American Herbalists Guild · Oct 26, 2026 |
| Retake policy | "Pending" applicants contact the Admissions Coordinator to reapply[1] | American Herbalists Guild · Oct 26, 2026 |
| Renewal | Renew via Autopay or directly through the AHG office[2] | American Herbalists Guild · Oct 26, 2026 |
| Delivery | Fully digital application via the AHG website[1] | American Herbalists Guild · Oct 26, 2026 |
| Score release (Part 1) | About 2–3 weeks[1] | American Herbalists Guild · Oct 26, 2026 |
| Score release (Part 2) | About 3 months (March → late June, July → late October, November → late February)[1] | American Herbalists Guild · Oct 26, 2026 |
| Testing window | Submissions paused; new window to be announced[3] | American Herbalists Guild · Oct 26, 2026 |
According to American Herbalists Guild, “In the second part of the RH application, applicants provide three case histories from their practice, two letters of recommendation from former teachers or other herbal practitioners, demonstrate their ability to assess several sample cases we provide, and their knowledge of materia medica.”[1]
The RH is a professional credential from the American Herbalists Guild (AHG). Unlike most tests on this site, there is no exam to sit. Applicants are assessed through a peer-reviewed application that includes 3 case histories from their own clinical practice, along with a description of their caseload and personal philosophy.
Everything is submitted digitally through the AHG website. Part 1 is free, and the AHG says it typically takes about 2–3 weeks to review. Part 2 carries a non-refundable fee of $100 for members or $175 for non-members. Review of Part 2 takes about 3 months: March applications are answered by email in late June, July applications in late October, and November applications in late February.
There is no time limit for completing and submitting either Part 1 or Part 2, so you can prepare your case material at your own pace. If an application is scored "Pending", contact the AHG Admissions Coordinator for details on reapplying.
Submissions are currently paused, and the AHG has said a new window will be announced. Check the AHG website for the latest dates, requirements and renewal instructions. Registered Herbalists renew through Autopay or directly through the AHG office. Because the AHG sets and can change these details, treat its site as the final word.
Prepare for the RH - Registered Herbalist exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.
Question: What is a key feature to observe when identifying a plant in the field?
Answer: B. Leaf structure and arrangement
Explanation:
The correct answer is leaf structure and arrangement. Leaf shape, margin, venation and the way leaves attach to the stem (alternate, opposite or whorled) stay consistent within a species, so they separate one plant from a look-alike.
Scent alone is a poor guide. It varies with weather, time of day and plant part, and some plants are hazardous to smell or taste. Soil colour tells you about the habitat, not the species, and many unrelated plants grow in the same ground. The number of insects nearby depends on season and chance, so it says nothing reliable about identity.
Rule to remember: identify by stable physical features of the plant itself, and confirm with several features rather than a single clue. This matters for safe harvesting and for correct materia medica work.
Question: Why are demulcent herbs used in formulations?
Answer: B. To soothe and protect mucous membranes
Explanation:
The correct answer is to soothe and protect mucous membranes. Demulcent herbs are rich in mucilage, which turns slippery and gel-like with water and coats irritated tissue in the digestive, respiratory and urinary tracts.
Energizing the body describes stimulant or tonic actions, which demulcents do not provide. Stimulating sweating is a diaphoretic action, used in a different part of a formula. Promoting urination is a diuretic action, again a different category.
Rule to remember: match each herb action to its tissue effect. Demulcent means coating and soothing, diaphoretic means sweat, diuretic means urine. When building a formula, ask which action each herb is there to supply, and avoid mixing up the action names.
Question: Which type of hypersensitivity reaction is responsible for contact dermatitis caused by poison ivy?
Answer: D. Type IV (delayed/cell-mediated)
Explanation:
The correct answer is Type IV (delayed/cell-mediated). Poison ivy contact dermatitis is driven by sensitized T lymphocytes reacting to the plant oil on the skin, so the rash appears after a delay rather than within minutes.
Type I (IgE-mediated) is the immediate allergic reaction seen in hay fever or anaphylaxis, which does not fit a slow rash. Type II (cytotoxic) involves antibodies attacking cell-surface targets, as in some transfusion reactions. Type III (immune complex) involves circulating antibody-antigen complexes lodging in tissue, as in serum sickness.
Rule to remember: if the reaction is a delayed skin response from direct contact and involves T cells rather than antibodies, think Type IV. This is useful when advising clients about plants that cause contact reactions.
Start with the AHG application pages and read exactly what Part 1 and Part 2 ask for. Then list the areas where you feel least certain, such as plant identification, dosage forms, herb-drug interactions or case follow-up, and match each to a practice set on this page.
Since there is no time limit on either part of the application, spend the time on drafting and revising your case histories rather than rushing. Our questions are written by us with AI tools and are not real exam items, so use them to check understanding, not to predict what a reviewer will ask. Recheck the AHG site for the submission window before you plan your timeline.
No. The Registered Herbalist credential is awarded through a peer-reviewed application, not a written test. Applicants submit 3 case histories from their own practice, along with details of their caseload and philosophy. The practice sets here help you revise the underlying knowledge, but they do not replicate a test.
Part 1 is free. Part 2 has a non-refundable application fee of $100 for AHG members and $175 for non-members. Always confirm the current amounts on the AHG website before you submit, since the AHG sets the fees.
The AHG says Part 1 typically takes about 2–3 weeks to review. Part 2 takes about 3 months. March applications are answered by email in late June, July applications in late October, and November applications in late February.
No. The AHG states there is no time limit for completing and submitting either Part 1 or Part 2. That lets you take the time to prepare your case histories carefully. Submissions are currently paused, so watch the AHG site for the new window.
If your application is scored "Pending", contact the AHG Admissions Coordinator directly. They can explain the details of reapplying. Policies are set by the AHG, so rely on their guidance rather than on this page.
Registered Herbalist members can renew through Autopay. If your renewal is not set to Autopay, you must renew directly through the AHG office. Contact the AHG for current renewal requirements and dates.
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