Get some BMO Super Plant Tonic. You will get the same results, only cheaper, and more organic (if Super Thrive is even organic in the first place). Look up Mycorrhiza Fungi to see what I mean about the benefits of Super Plant Tonic/Mycorrhiza.
I'm not sure how I feel about Super Thrive. I tend to think that it's mostly snake oil. A buddy of mine with 20+ years of growing tried this stuff, at recommended doses, and burned the shit outta his sativas! Sativa's are low nute loving plants anyway, but Super Thrive doesn't claim to have an NPK or any micro nutes. It claims to just have B vitamins and other stuff. I've also read reports on RIU and other forums of it doing this, and really fucking up crops. I don't think I'm gonna buy it. Literally & figureitivly.