IMO, the best leaves for tea are the ones that the tree has drawn all the green out of naturally in the fall and then dried after they fall on their own or dried on the tree. If there was still some green in them and they dry, I think the taste is very...vegatative for a lack of better words or like you made tea from some green grass clippsing vs. the pleasant suttle cocunut/fig flavor and aroma of a yellow dried leaf. Fig tea has a mild laxative affect also.