Several challenges with this. First, you have to have access to lots of trees of the same species to make your experimental groups large enough to draw conclusions. Second, Superthrive has soooooo many claims on the label. It says it does EVERYTHINNG. My experience has been testing and disproving (to my own satisfaction) one claim, and then be attacked by Superthrive's proponents because I didn't test claim 2, 3, 4.....