I keep them in mason jars as well but in the basement fridge crisper. I can be a bit of a glutton, I can only legally grow 4 plants but have probably 40 seeds consisting of probably a dozen varieties. Keeping the auto's for outdoor cottage grow and the photos for my 2 inside grows per year so I needed to be able to store for extended periods and all I read said that is the way to go. Than again I could be wrong, I do smoke allot.