I don't use plastic bags for curing. I just use airtight mason jars. I cure only homegrown, not bought weed as curing it further would be pointless. I dry my fresh herbs for around 5-7days, place loosly in an mason jar, open jar twice, every 12 hrs, then let it cure further for about another 7-14 days. Depends on when I get around to smoking it.

I prefer a short cure over long cures. I like a nice, fresh smoke.