I would assume since it is dried, it should last quite awhile. I just bought some from a spice shop this past weekend for a White IPA and plan to keep it around a bit. Or if you're really worried about it, you can just make a tincture with all of it and that will definitely last a long time.
"Whoever drinks beer, he is quick to sleep; whoever sleeps long, does not sin; whoever does not sin, enters Heaven! Thus, let us drink beer!"
- Martin Luther