Herbarium of the Ancients — Detailed Monograph

Rumex crispus

Please read before use: the information provided 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: The root contains oxalates and anthraquinone compounds that may have a marked laxative effect at high doses: prolonged or uncontrolled use is not recommended. Not recommended for pregnant or breastfeeding women, or for young children, due to insufficient safety data. People prone to oxalate kidney stones or suffering from kidney disorders should avoid the root, which is rich in oxalates. Medical or qualified herbalist advice is recommended before any internal use, particularly in case of ongoing medication (possible interactions with certain medicines, especially digestive or diuretic drugs).

Decoction — Root

Dried root decoction

The dried and cut root is gently boiled for a few minutes in water, then left to infuse covered before straining. This traditional preparation was reserved for occasional short-term use, under informed guidance. Dosage should be validated with a healthcare professional or recognized pharmacopoeia before use.

Tincture — Root

Root tincture

The fresh or dried root is macerated for several weeks in alcohol, then filtered and stored in a tinted bottle. The use of the tincture, being more concentrated, requires professional advice to determine dosage. Dosage should be validated with a healthcare professional or recognized pharmacopoeia before use.

Cooking (vegetable) — Leaves

Cooked leaves as wild vegetable

The young leaves are blanched then cooked in water, similar to spinach, in order to reduce their natural acidity related to oxalates. They can then be prepared as a side vegetable. Dosage should be validated with a healthcare professional or recognized pharmacopoeia before use.

Where to find it

Sourcing the plant

Rumex crispus is found growing wild in meadows, ditches and waste ground throughout Europe; its dried root is also available from traditional herbalists.

Harvest season

When to harvest

The root is traditionally harvested in autumn, once the plant has reached maturity, while young leaves are gathered in spring before flowering.

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