Herbarium of the Ancients — Detailed NotebookFR · EN

Field Horsetail

Equisetum arvense
Read before use: the information below describes traditional and informational uses — it does not replace the advice of a healthcare professional. In case of doubt, pregnancy, breastfeeding, ongoing treatment, or use in children, seek advice before use.
Enhanced precautions for this plant: Do not use during pregnancy, breastfeeding, or in children without the advice of a healthcare professional. Avoid in case of heart or kidney failure, as horsetail promotes water elimination and may disrupt electrolyte balance. Do not extend use beyond a few weeks without medical advice; prolonged use may affect the absorption of certain vitamins (particularly B1). Consult a pharmacist or physician if taking medication, especially diuretics or cardiac treatments, due to possible interactions.
Infusion — Stem

Traditional horsetail stem infusion

Infuse the dried stems in simmering water for about ten minutes, covered. This preparation, taken in short courses, was the most common form in traditional uses. It is advisable to seek professional advice before any course of treatment, particularly regarding duration. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Decoction — Stem

Decoction for compresses and baths

Gently boil the dried stems for about fifteen minutes, then allow to cool before soaking a compress or preparing a hand or foot bath. This external application was favored for the skin and tired joints. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Powder — Root

Dried root powder

The root, more rarely used, was dried then ground into powder to be incorporated into local preparations. Its use being less documented than that of the stem, caution and professional advice are recommended before any use. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Where to find it

Obtaining the plant

Field horsetail can be found wild in damp meadows, ditches, and roadsides throughout Europe, as well as dried in herbalist shops and pharmacies in tea or capsule form.

Harvest season

When to harvest it

Sterile stems are traditionally harvested from late spring to early summer, before their natural drying.

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