A Decoction

Measure the herbs into a glass, earthenware, ceramic or unchipped enamelled {never use aluminium) pan, powdering or breaking up dried herbs into small pieces and cutting fresh herbs into small pieces, then pour the water over them. Bring to the boil and simmer for the time given in the Directory (usually 10-15 minutes). You might find you need more water anyway than for an infusion because of evaporation. If the herb(s) contain volatile oils, place a tight-fitting lid on the pan, and lower the heat. Strain the tea directly after simmering while it is still hot, and then use in the same ways you would an infusion.