Making A Decoction
This is much the same as an infusion (tea) except you are working with a much more solid herb such as thick pieces of root or bark which can’t be ground up or the remedy calls for a much stronger dose..
This is the one case where you should BOIL THE HERB. In fact that’s the whole
process. Make sure that no steam escapes or the vital oils will go away with it. Also (of course) never use any metal when doing ANY herbal remedies.
If you will have more than one ingredient in the decoction begin by boiling the
toughest then work down. Start with cold water and after boiling for what you
consider long enough allow it to steep usually for at least 30 minutes.
Witches Of The Craft® 