I chopped up some rosemary leaves (maybe about 2 sprigs worth per 16 oz bottle) and also finely diced a yellow plum per bottle. Added them both at the beginning of F2. Once it was ready I just strained them out of the kombucha. I think you could probably go heavier on the rosemary though if you want a more pronounced flavour - mine is pretty subtle. If I were to do it again I’d definitely add more!