I've seen supersoil mixes before (from superweed man and subcool.....etc) and its basically the same method. Top soil and then super soil and the bottom. I'm still going to use it (since I paid for it) and post images of my end results. We'll see if kindsoil is truth or not.
I urge you to mix in the "supersoil" into the entire mix, and not layer it.
or layer it and prune your roots with the "supersoil" and wash away MOST of the soluble nutrients in it.
the soluble nutrients that are supposed to last until "later"..
it's your choice..
think about it. WATER SOLUBLE nutrients.... (guano, blood meal, etc) that are supposed to last weeks until your plant "needs" it??
is he still using bovine bone meal?
Just think about how plants work.
knowhattamena Verne?