Ganja in my Garden!!Help please

Well, I just returned home today from a long trip up north... Have been neglecting garden unfortunately partly cz of work schedule and also because of the soaring heat...But today I found SOMETHING!!it has been growing in my garden for who knows how long?I know there are lots of "ganja farmers" out here...I just wanna know if you guys can identify this for me...looks sativa to me..or is it too early to tell...also, is it a hermaphrodite??? Any info on this would be cool..ThanksNamaste