“An infusion is a large amount of herb brewed for a long time. Typically, one ounce by weight (about a cup by volume) of dried herb is placed in a quart jar which is then filled to the top with boiling water, tightly lidded and allowed to steep for 4-10 hours. After straining, a cup or more is consumed, and the remainder chilled to slow spoilage. Drinking 2-4 cups a day is usual.” via:http://www.susunweed.com/How_to_make_Infusions.htm
Suggested Length of Time for Infusions in glass jars:
Roots and barks: 8 hours minimum.
Leaves: 4 hours minimum.
Flowers:2 hours minimum.
Seeds/berries: 30min. minimum. ( I add much more time for most seeds.)
AND FOR THE BASICS OF WHY TO DRINK SUCH NOURISHMENT READ HERE: