Look it won't hurt you to let it grow...weed is a different animal altogether...I had a clone that drooped and died ,I tore the top off, but left the stem...it looked more than dead...stem looked drowned,,,yesterday when i was transplanting clones I noticed it had 3 roots growing..who would've thought...anyway, it looks to me that you need to add some perlite to that mix of soil...is that just dirt from around the house?...later...
and personally i wouldn't water the shit out of it,imho...