It looks like the pot in the foreground is lower then the other. The plant in the background doesn't looked stretched to me. Are they at differen't heights?

I also wouldn't bury the stem at all. When it comes time to re pot I would plant at the same depth with just a sprinkling of new soil on top of the old. Sorry Mobay but I can't think of any benefit to burying the stem.

Anyway, good luck with the grow

Laterz