I too have frozen weed. Only b/c I bought it in bulk. I just used a ziploc bag, and it worked. My father-in-law is famous for buying a bag and keeping it for months at a time. He only smokes with us "kids" when we go camping or have a party at his house. He likes to take care of us all by having the weed. We all laugh at him b/c his bags last soooo long. We all know if we are out, Dad always got some. Anyway, back to it keeping. When I smoke his it works just the same. I know he doesn't do anything special to store it. It's in a toolbox in his shed, in a baggie. So no, weed doesn't go bad, it just gets very dry. Hope that helps.