A vacuum seal(food storage) bag will keep marijuana potent for up to 5years if kept in a dark room between 40-55F
Vacuum seal it in jars, using one of these: http://www.amazon.com/FoodSaver-T03-0023-01-Wide-Mouth-Jar-Sealer/dp/B00005TN7H
You can vacuum seal mason jars by placing them upside down filled and sealed of course in boiling water.
What vacuum machine do you use in conjunction with this?
Just like good ole canning. Was wondering why vac seal when the jar can do it itself.