There is your problem, dude... You are assuming that the OP doesn't know what schwag is. I don't know why you're assuming this, Because he obviously knows exactly what schwag is. He is asking what causes scwag, Growing conditions, or Genetics. I'll go over where I think your logic is flawed, or at least different than the OPs.
His view:
-Man this schwag that I've been smoking sucks dicks
-I love smoking headies!
-Weed is expensive, so Why don't I just grow it.
-WAIT! I don't wana grow schwag, cus it sucks ass, I want to grow headies.
-RIU!!! What causes schwag to suck?
Your view:
-This kid is asking what schwag is! WTF?!? Why are you here if you don't know what schwag is?
- AMIRITE GUYZ AMIRITE???
-NO? I misunderstood the question?
-Fuck you guys, suck balls, I could outgrow you motherfuckers, I don't even know why I'm here because all the cool kids left. *FLAME*
-You want proof? Pics of my buds? COPS! No, you can't see pics of my non-existant bud.
-I'm still posting because I'm butthurt, and need to win the e-fight so my peen doesn't feel so shriveled.