Does Cannabis Expire? Everything you need to know about preserving Marijuana products.
By Jeff Eckenrode
Quick Answer: Yes, cannabis expires — but proper storage slows degradation significantly. Heat, light, air, and moisture break down THC, terpenes, and trichomes in flower, edibles, tinctures, and vapes. Store cannabis in airtight containers at 50–60°F and 55% humidity. Freeze for long-term storage. Avoid refrigerating cartridges. Handle gently to protect delicate trichomes.
Cannabis is a very delicate plant. When we zoom in on a cannabis flower using a microscope, this becomes abundantly clear.
You can clearly see dozens, if not hundreds, of fragile tiny sacs called “trichomes”.
Trichomes are packed FULL of special molecules like THC, CBD and the like along with dozens of flavor and aromatic molecules called “terpenes”.
Together, these molecules work in concert to deliver a wide variety of highs and experiences when smoked, vaped or ingested. Simply put, Trichomes are THE MOST important part of any flower-focused cannabis product.
Without them, the most you would get from smoking your favorite joint or vaping your favorite cart is a headache!
But they are also the most fragile part of any flower-based cannabis product. If you’re not careful, they can easily break off your cannabis flowers if they are handled carelessly.
Or worse yet, trichomes can degrade and disappear entirely if they aren’t carefully protected from light, heat or oxygen. When that happens you can say “bye-bye” to the amazing flavors and effects you’re hoping for in your favorite cannabis product.
So how can you avoid that? What should you do to keep your cannabis products from degrading or expiring entirely?
How to Store your Cannabis Flower and Concentrates
It may seem obvious to us but it is worth saying: cannabis is a natural product. And that means its exposure to heat, air, moisture and light will limit its potency and its shelf life.
Cannabis flowers and extracts are best stored in airtight containers and in dark, cool places to prevent deterioration.
For short term storage, it is best to keep products at 50-60 F and at 55% humidity.
Can I Freeze my Cannabis Flower and Concentrates?
You betcha! Freezing cannabis flower and concentrates works well for long term storage.
However, cannabis flowers should not be thawed and refrozen again. Why? Because doing so increases the likelihood for mold to develop.
What’s “too hot” for cannabis Flower and Concentrates?
Avoiding temperatures over 80 F is best practice. Heat will often dry out cannabis flowers and convert THC to CBN, which can have undesired, sedative side effects. (Want to learn more about THC? Then click here!)
What’s “too humid” for cannabis Flower and Concentrates?
Storing cannabis flower or concentrates in a humid environment is also no good. And excess moisture can cause dangerous bacteria to grow.
Medical and Recreational cannabis flower requires better packaging than an old school baggie. Hard plastics such as polyethylene are good storage choices. So are glass jars with airtight lids (Fun fact: amber or blue-colored jars filter more light to reduce degradation).
What’s “too rough” for Cannabis Flower and Concentrates?
Be sure to handle jars carefully and avoid shaking or squishing the flowers. Heavy movement will dislodge trichomes and cause oxidation to occur.
But what about my Cannabis Edibles, Tinctures and Cartridges?
Many of the best-practices for storing cannabis flower apply to other product types as well, including: tinctures, edibles and cartridges.
Storing and Preserving Cannabis Tinctures
With regard to tinctures, there are two types of tinctures to consider: those with an alcohol base and those suspended in oil. Alcohol based tinctures don’t require refrigeration and should be stored in a cool and dark place. Oil based tinctures should be refrigerated to slow the breakdown of THC and CBD and to preserve freshness. When refrigerated, cannabinoids in tinctures often precipitate out of the solution and stick to the walls of the bottle. So remember to shake all tincture bottles well before use. Not only will this dislodge cannabinoids that become stuck to the bottle’s walls but it will also ensure more even dosing as cannabinoids also tend to sink the bottom of the bottle.
Storing and Preserving Cannabis Edibles
Just like any food product, edibles are perishable. Although freezing and thawing at regular refrigerator temperatures is a popular method for preserving baked good edibles over long periods of time, this process can encourage the growth of molds.
Be sure to check for expiration dates on all perishable goods before taking a bite. And try to avoid freezing and thawing baked goods beyond their expiration date to minimize the risk of food-borne illness.
Specifically, cannabis chocolates should be stored in a cool dark place, just as you would store any cocoa product. In contrast, hard candy edibles have a longer shelf life than baked goods.
Storing and Preserving Cannabis Vapes and Cartridges
Although cannabis concentrates, which include cannabis oils, waxes and rosins, can often be refrigerated for long term storage (over three months), it’s generally a bad idea to refrigerate or freeze your cannabis cartridges. Why? Because doing so can corrode or destroy the electronics in your vape pen or cartridge!
Cartridges with a low viscosity, like CO2 oil, should be stored upright at all times. This reduces the risk of the oil seeping into the cracks and crevices of the mouthpiece. When that happens it is very difficult to remove and to use properly.
The “Takeaway” for storing any Cannabis product
Generally speaking, rough handling, heat, light and exposure to air degrade the quality and potency of any cannabis product.
So be gentle, handle your cannabis products with the same common sense that you would handle with food and you’ll be able to enjoy your favorite products without worries and free from hassles.
Where can I find accessories for storing cannabis products?
Whether you’re shopping online or in Redmond, we’re here to help you find what you need, when you need it. That includes accessories for storing cannabis products!
Click on our online menu link below to see our current availability.
FAQ Storing and Preserving Cannabis
Does cannabis actually expire? Yep! Cannabis doesn't spoil like milk, but it absolutely degrades over time. Heat, light, oxygen, and moisture break down THC, CBD, and terpenes — the good stuff — leaving you with a weaker, less flavorful product.
What's the best way to store cannabis flower? Keep it in an airtight container in a cool, dark spot. Aim for 50–60°F and around 55% humidity. Glass jars with tight lids (bonus points for amber or blue-tinted glass!) are a great choice.
Can you freeze weed to make it last longer? Totally! Freezing cannabis flower and concentrates works well for long-term storage. Just don't thaw and refreeze — that cycle can encourage mold growth.
What temperature is too hot for cannabis? Try to keep your stash below 80°F. Too much heat dries out your flower and converts THC into CBN, which can cause unwanted sedative effects instead of the experience you're after.
Should you refrigerate cannabis cartridges and vapes? Nope — skip the fridge for carts! Cold temps can corrode the electronics in your vape pen. Store cartridges upright at room temperature instead, especially low-viscosity oils like CO2 oil.
How should cannabis edibles be stored? Treat them like any perishable food — check expiration dates, keep chocolates in a cool dark place, and avoid repeatedly freezing and thawing baked goods to reduce the risk of mold and foodborne illness.
How do you store cannabis tinctures properly? It depends on the base! Alcohol-based tinctures are happy in a cool, dark cupboard. Oil-based tinctures should go in the fridge. Either way, always shake before using — cannabinoids can settle or stick to the bottle.