I am not familiar with the product,but am always leery of anything with unknown ingredients, promising such things as "stimulation of the roots". Al

http://www.amazon.com/Fertilome-Root-Stimulator-4-10-3-Gallon/dp/B00816XPHA/ref=sr_1_3?ie=UTF8&qid=1339251521&sr=8-3&keywords=fertilome+root+stimulator

they sell it everywhere...

I would skip it for containers and trees planted out, unless your soil is granitaceous or very sandy. There is very probably no value in the excess P (7-10 times more than necessary) or the thiamine. The only fraction of the product that might have the potential to be beneficial is the IBA it contains, and I think that is more than offset by the potential negatives associated with the excess P.

Al