the trick is to get it all right. The heat mat, the tray and insert with water, the clone dome. Fir the first three days take the dome for a half hour at a time while you watch tv then by the third day you can leave it off. For those days never spray the plants just the dome. I use b1 or superthrive, hydroguard, and when I am brave sneek in some flower nutes. P helps them root. N tops it so be careful there. I however do this with peat, rw is harder to get right. ALbfuct weighs them. Has a huge thread. Should be lile peat tho.