I have posted a thread in harvesting and curing section with no response to this same question. I researched back to 2011 and found little proof of procedures that worked for more than one grower. Spenc - your storing for four years? Just burping every 3-6 months? I was thinking about using inert gas like they use in wine to replace the air in the glass jar after opening or using a vacuum canister to suck all the air out.If you dry it right, put it in a jar sweating out most of the moisture. After that normal curing possess is done you can then continue to cure weed for up to 4 years opening the jar only every 3-6 months depending on the budds need. The longer it cures the better and smoother tasting it is. It does lose some strength however I feel it is worth it.
You have some great insights - always interesting reading your posts. +rep!It degrades. 6 months at the outside when it's cured by a knowledgeable grower. If vacuum packed in glass that might be another thing but the moisture from the heated glass would doom that I believe.
Resurrection of a 3 year old post as your first post is a bad idea...I know this is an old thread but I recently found a just over vacuum packed bag of some buds in a stash spot that i'd completely forgot about. I could tell by the bag that it was one of the ones i'd used two years ago growing.. Getting to the point they had been flattened under many items in the complete dark in vacuum packed bags. They didn't look anything like that year i'd grown, there were no crystals that you could see from plain view, but through a USB microscope there were pretty much only trichomes you could see. The way they were packed they had sorta became very brick weed looking, it was possible to cut in slices..barely any smell. However, the stone was crazy, the strongest i've smoked in five or so years.. but the taste of the smoke didn't taste like anything i'd ever tasted before.. certainly not like pot. Everyone I've let try this stuff says the exact same thing..