We have a jar of over eight month old weed in a sealed mason jar kept in our refrigerator.Took one pull off from it last night (Romulan)and it just laid me out,I was in shock one big pull could do that to me anymore.So if its done right (sealed,no light,moisture,etc.)you should be fine.First thing Id do is get your stash out of the plastic bag and get a nice sealed jar.Good luck,take care,be well,and most of all be safe.