Quote Originally Posted by Mono
my buddy had a problem with mold in his air tight jars

so does that mean that it has to be moisture free before concealed?
Yes. air tight jars the BEST way of storing weed. But you have to make sure it's dry first, or open it for half hour - hour every day. If it molds its worthless.

your thread title "how to increase THC crystalls" is abit dodgy - you cant increase crystalls by storing it. The only way to can increase crystal [trichome] production is during flowering. As soon as it's cut, that's it.