To answer your question...Yes.. it does grow wild...At least where I live."Oklahoma"...You can go walk through a dense forest of the stuff if you'd like...I've strolled through many myself...I grew my plants from Wild Weed I found last year..And no it isn't feral or hemp...that is a misconception..It's just low low low grade hermaphroditic schwag. All you have to do is sex them..very simple..You won't get anything like Chronic..But you can up the potency from dirt weed to nice mid-grade..Which isn't half bad at all....I took a few plants from a wild forest transplanted them October of 06. They were mostly males..and they grew right back the next year..all females...A few males sprouted up to..But I kindly destroyed them as to not ruin the potency of the refer...They are already pre-budding..doing very nice actually
So yeah I can say from experience that Wild weed can be good...If you take the right measures with how re-grow it..The wild males serve a very good purpose..Just rip one out of the ground and toss it where you want it to grow next year and BaM..You will have a mini-forest of ganja before you know it..All you have to do is take care of it and remove the males at the right time

Here's two pic's of the ones I got goin right now... to show you a legit example of what i'm talking about here