To begin, my disclaimer: I'm NO expert! This topic about root stimulants (auxins) has been reviewed here and a other forums time and again. So just for the sake of information and clarification let's review. There are several root stimulants available for retail sales: SuperThrive(SUPERthrive - Wikipedia, the free encyclopedia), Dyna-Gro KLN(http://www.dyna-gro.com/Website%20pd...MSDS%20KLN.pdf), and Hormex(http://www.hormex.com/labels/hormex_liquid_label.pdf) to name a few. All contain "similar" chemicals, 1-Napthaleneacetic Acid (NAA), 3-Indolebutyric Acid (IBA)(Indole-3-butyric acid - Wikipedia, the free encyclopedia) and Vitamin B-1, to varying degree. SuperThrive contains NAA and Vit-B1 along with 25% "dissolved solids" whatever they are; it's a secret! The other two contain both NAA, IBA and Vit B-1. KLN states it contains, "just the right
amount of essential minerals to get cuttings off to a great start." The bottom line from my perspective is you will use, if at all, whatever you have found works in your situation. Having said that, there are many people out there that believe if you have good plants and good growing "habits", there is no need for these kinds of products. Now I will mention a fourth product that contains none of the afore mentioned chemicals: Essential Plus Natural Plant & Root Stimulant made by Growth Products. This product contains, "100% natural organic ingredients derived from potassium Humate, 20 natural L-amino acids, "enzymes", simple and complex sugars, vitamins, kelp extract, lignin and hydrolyzed organic proteins!!!!!!! WOW, now that's a mouthful! I personally have no research knowledge that any of these work better than another. I have never used KLN but have used SuperThrive. Currently, I am using the Essential Plus and for me in my growing situation believe it has made a difference in root development over SuperThrive. Remember, these are my unscientific observations! I'm not using this posting to sell anything but for me to get the Essential Plus product I had to purchase 12 32oz containers.... needless to say that's a lot of product! So if anyone wants to help me out with this, you know how to find me!