Here's my weapons of choice for this. Since I am going to play with water farming I'm going to take a dozen clones and put half in rock wool, which I have never played with before
I use peat plugs for dirt and they are soaking in clonex mix to season them before I start, no food, just water and clonex. The Dr. Pepper is just for me.
I have seen weirder things than using Dr pepper for the rockwool preconditioning step. Lol. It does, after all, contain phosphoric acid! set those cubes to hydro ph, like 6.6, before ya get going.