I've wondered the same thing - if weed goes stale. Let me tell you, I have samples of weed that are very old - I have kept them in tiny little zip-top type craft bags. I have never tried any of them to see if they are still any good, so that's why I am looking on here about it. I was just going to give it all to someone, and am not sure if it's really any good to smoke - I got stuff that goes back to 2003...do you really think it's any good? I'm seriously thinking of chucking it all in the garbage, since I have stuff from 2007 and 2009. I'm f**cked up, I admit, keeping samples from the stuff I bought, dont ask me why I do it though, I have no clue...