Herbarium of the Ancients — Detailed MonographFR · EN
Marsh Marigold
Caltha palustris
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: Marsh marigold is toxic when fresh to both humans and animals; any ingestion must be avoided. Seeds and fruits do not have a sufficiently reliable documented traditional use for domestic purposes. Never confuse with other yellow-flowered plants from wetland areas; misidentification is a known cause of poisoning. Consultation with a healthcare professional or qualified botanist is essential before any handling of this plant.
Drying — Seeds / fruits
Traditional seed drying
In certain ancient practices, seeds were harvested at maturity then air-dried away from light, before being stored for very occasional veterinary use. This practice is not recommended for human use and must be supervised by a professional knowledgeable about the plant. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.
Where to find it
Obtaining the plant
Marsh marigold is found in the wild in wetlands, marshy meadows and stream banks across Europe; it is not sold in herbal shops due to its toxicity.
Harvest season
When to harvest it
Seeds and fruits form after spring flowering, generally harvested in late summer when the capsules are dry and brown.
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