Wow, I never knew Yarrow was at the top of the list for activating the mojo in compost. I grow a patch of it and often clip off scraps which I throw onto the compost pile. Think I will start adding yarrow greens to my compost bucket too, which I use to make compost drippings/tea. Usually I only throw kitchen scraps and weeds in my compost bucket.

Is there any way to measure the quality or effectiveness of the compost tea? It is brown and full of tannins, but looks and scent doesn't tell us much.