building a soil

So I've done a few "super soil" like grows with good success but have a question about if the method is sound in terms of products used. Would it make sense to add single ingredient ammendments to a blended fertilizer mix that contains said ingredients? Does adding the npk ratios of the blend...

Hey all. I've read about the different methods of using super soils. I'm interested in the concentrated soil at the bottom of the pot style and want to adapt that but as reserve for when I go into bloom.I want to build my soil to have a bottom layer for bloom and the rest filled with just a...