I started using this product about 6 months ago and so far I have deduced that superthrive can be beneficial in certain situations. It is definitely a root stimulant. For example, I gave a good dose to my C. renda which has its pot sitting in a shallow tray of water. Within two weeks, vigorous new roots were growing out of the bottom of the pot into the water (no other variables had been changed recently). As far as I know, superthrive is just B vitamins and various plant hormones.
-Michael