Gently boil the dried, cut rhizome in water for about ten minutes, then let it steep off the heat for a few more minutes before straining. This preparation was consumed warm, generally in short courses of a few days to a few weeks. Dosage must be validated with a healthcare professional or a recognized pharmacopoeia before use.
The fresh or dried rhizome was sometimes macerated in alcohol according to traditional herbalist methods, for use as drops diluted in a little water. This concentrated form requires professional advice before use. Dosage must be validated with a healthcare professional or a recognized pharmacopoeia before use.
Couch grass is found in the wild in meadows, gardens, and waste grounds across Europe, but its dried root is mostly available in herbalist shops, often cut and ready to decoct.
The rhizome is traditionally harvested in spring or autumn, once the soil is loosened, then cleaned and dried before any use.