Shelf-life?

Do any of you know how long you can store weed in a bag in a dry environment? I have a bag with 1.3g in it that was the remainder of the second bag of weed I ever bought, 1 year ago. Does the THC decompose after so long or will it still get me high? Hopefully it will, just in case I got an Oz. of nug as back-up. Thanks for the help.

so you jus left it in the bag? it wasnt in jars or anything?...i mean it wont do anything to you bad for u unless there is mold on it, but i doubt much of the thc will be left in the nuggs