SuperThrive is a Vitamin B1 supplement, made from urea (piss) ... it is very good for ONE thing: rooting ... it does do a very good job of building a good root system, that is why it gets the reputation for 'stress relief', etc ... it does NOT influence sexing, as some claim (I have seen posts swearing that soaking a seed in Superthrive water will make it a female - bullshit) ... use it in the first stages of growth, and after a transplant, other than that, don't waste your time ... I have personally seen too much Superthrive KILL a plant, don't overdo it ... I grew very successfully for 40 years before I even heard of the stuff, and I am not very impressed with it ... :smokin: