plants that young need more then just superthrive, you can pick up netted pot for a quarter each, or reuse some from store bought plants. you will need nutrients for these lil gals. an easy solution is a hydro 3 pack nute. its cheap and easy. start low, like 1/4 strength the recomended dosage. and work your way up. use good water, RO, distilled, filtered, if it is tap, then leave it in a bucket 24h so the chlorine will evaporate. stay away from foil unless its too cover your food. its not very predictable. you can get mylar for the walls at the dollar store in the form of wrapping paper. fresh air, good water, good light, good grow mediium, good nutrients, TLC. your good to go. happy grow good luck and peace