Go buy a couple compact fluorescent lights (8-14 dollars at wal-mart)and put them 2-3 inches above the leaves. That will make them stop stretching. When you transplant bury all that stem up to an inch below the bottom leaves. The stem will turn to root. If the stem gets too tall and weak, splint it up with a soda straw split lengthwise til you transplant(take it off before transplanting)