It’s a classic scenario: you’re out of bud and in your frantic search for more you discover a long-forgotten baggie of flower somewhere in the back of your closet. You’re excited about your find. But wait: how long does weed last? How long is weed good for? Can you still smoke that old, dried out marijuana? How long does weed stay good, and what happens if you smoke weed that isn’t fresh? This guide has all the information you need.
How Long Does Weed Stay Good: The Basics
Let’s get to the heart of the matter. How long is weed good for? Under ideal storage conditions, cannabis can actually stay relatively fresh for a surprisingly long time.
If you’ve done an exceptionally good job of storing your bud, and you’re a little bit lucky, you may be able to stretch that timeline even further. Possibly to the point of approaching two years.
But for most weed smokers, conditions are less than ideal. In the absence of humidity controlled storage containers, and assuming that your weed will encounter some degree of light and the temperature might be less than perfect, don’t expect to get a full year out of your weed.
So how long does weed last? In general, try to consume all your weed within six months of purchasing it. But, of course, if you’ve invested in high-quality storage equipment, then you can push it out to the year mark.
How Long Is Weed Good For: The Scientific Answer
Now that you have a general idea for how long does weed last, let’s get into the more scientific answer. First, it’s important to understand what actually happens to marijuana as it ages.
As the terpenes break down, your bud loses flavor and scent. As a result, old bud is relatively tasteless and lacks that distinctive, sharp odor that fresh weed is supposed to have. Sometimes, old weed will end up tasting harsh and nasty. Either way, when the terpenes have broken down, your weed won’t taste or smell the way it’s supposed to.
Similarly, and probably more importantly, cannabinoids also break down over time. Old, worn out bud won’t be as potent because a lot of the THC will have broken down and dissipated.
And here’s where we can get very precise with figuring out how long is weed good for. Fortunately, the United Nations Office on Drugs and Crime has looked into things for us.
Their researchers found that, on average, cannabis plant matter loses THC potency at this rate:
- After one year, weed loses roughly 16% of its THC.
- Two years in storage results in a loss of 26% of its THC.
- Weed loses 34% of its THC after three years.
- After four years in storage, weed loses 41% of its THC.
How Long Does Weed Last: Is Your Weed Bad?
Let’s return to that old bag of weed you found at the back of your closet. How do you know if it’s bad? Basically, you’re looking for a few things:
- Is it moldy? If your weed was too moist or humid, it may develop mold. Do not smoke moldy weed!
- Is it dried out? If your bud has crumbled into dust, it’s obviously too old.
- Does it smell fresh? Old marijuana lacks the crisp scent of fresh weed.
- Does it break apart? If it’s spongy and doesn’t make any sounds when you pull apart a nug, it might be damp and moldy. If it instantly breaks down into dry dust, it’s too old.
So How Long Does Weed Stay Good For?
If you determine that your weed has gone bad, it’s not the end of the world. Technically speaking, you can still smoke it. It just won’t taste very good. And since most of the cannabinoids have probably already broken down you probably won’t get very high.
But smoking old weed won’t kill you or make you sick. The only exception is moldy marijuana. If your flowers have encountered too much moisture they might get moldy.
If you see discolored spots, white fuzzy mold, or if it smells like anything other than cannabis, don’t mess with it. Smoking or otherwise ingesting mold can definitely make you sick or worse, so steer clear.
Now that you know the answer to the question, how long does weed stay good, what should you do to keep it fresh? To preserve your bud for as long as possible, practice proper storage techniques.
Try your best to control temperature and humidity. Keep it away from direct sunlight, and store it in a cool, dry, dark location. With a little bit of care and some basic equipment, you can get the most of your bud.
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