this is some retarded ass shit.do you guys listen to everything big mike from AN tells you, too?
h2o2 is an oxidizer plain and simple. people add it to run a sterile res in hydro. it kills bacteria, both good and bad. why anyone would use this in SOIL, which relies on bacteria to break down organic matter, is beyond me.
come on guys, use your brains. if you have never taken a horticulture, botany, or basic chemistry class then head on down to the junior college and sign up. Better yet, save $300 and just use google. but make sure to google reputable sources, because as the OP has shown us, there is a lot of misinformation on "grow forums"
It might be beneficial as something that rains down on your foliage, attacking mold/bacteria on your leaves, but that doesnt mean any good will come from dousing your soil with it.
edit: im not trying to cut down the OP, but man you shouldn't take something your stoned friend tells you as truth, then proceed to make a post about it, spreading the misinformation to other new growers.