Pprrranswered grow question 3 years ago Hi, since i have tried once the rockwool method i never fail a germination. I suggest you to try! The only thing to pay attention whit this method is to not over water the rockwoll, that absorb a lot of water, personally, i sink the rockwoll in water than i squeeze It ti remove the excess. I big pro of this method is that after the germination you can transfer the rockwool whitout any stress for the plant wherever you want, soil, coco, hydro or even on a cat etc... Hope you the best for tour project!