I used glass of water, and when the seeds are submerged, i place them carefully in a little green house and Papel towel + heating mat. It worked fine for only two of three seeds. I prepared my grow room for 4 seeds (3 GG and 1 Northern Light( for a next guide ;) ), so i later used the extra pot for plant companionship with peppermint to camouflage the smell and for fun. I don't use root booster but i think it's recommanded. I prepared my pots with indoor potting soil mixed with vermiculite (30%). It's worked fine, but later i will use BioBizz All Mix (especially potting soil for Cannabis).