But how long does it take weed to go bad? This is a difficult question to put a number on. Assuming a consumer has kept a small amount of bud enclosed in a container and out of high heat, it should be fine for at least a year. There are stories of people smoking cannabis that had been stored since the 1970s. While it will probably still get you high, the terpene profile is altered drastically over that sort of time period, meaning the high you experience will certainly not be the same as if you consumed it back in the 70s.
Cannabis concentrates are still organic substances and therefore subject to natural degradation.