I just added a stick of cinnamon to the secondary on a wheat I'm doing for Christmas. I did a search and couldn't find info on length of time that people normally leave cinnamon in.
People who have used cinnamon in the fermentation stage, how much did you use, and how long did you let it sit for?
People who have used cinnamon in the fermentation stage, how much did you use, and how long did you let it sit for?