Replying to Growing, need some personaly advice...

okay so my buddies and i planted some weed in the spring just seeing if it would work and forgot all about it, we were walking in the woods today and found about 6 plants 3 ft. high which is awesome. now we dont really know what to do. when is it usually ready to harvest? and also we are gonna put it in pots and into this abandoned house right next to my friends or something? idk can someone give some basic advice on what to do? thanks.