How do you store weed properly?
Weed stays in better shape when it stays in the original package, sealed, in a dark, cool spot that locks. DCP says to store cannabis products in their original packaging, locked up and out of reach of children and pets, and the package itself is required to be child-safe, tamper-resistant and light-resistant. Dark and cool come from the storage research below.
What a four-year study says about cold storage
A four-year storage study tested cold directly. The study, which is listed on Europe PMC with its abstract from Forensic Science International, kept hashish and marijuana samples under light at room temperature, in darkness at room temperature, refrigerated at 4 °C and frozen at -20 °C.
In that study, temperature changed only the speed of THC to CBN conversion. Light changed both the speed and the stoichiometry of that conversion, which means light changes the chemistry of the reaction, not only its pace. Refrigeration at 4 °C and freezing at -20 °C were two of the conditions the study varied.
The Department of Consumer Protection (DCP) says to keep cannabis products locked up and out of reach of children and pets, wherever you store them.
What the stored samples showed about THC and CBN
The study states that CBN is produced from the degradation of THC. Under both room temperature conditions, in light and in darkness, it found significant THC degradation and CBN formation.
Darkness at room temperature is what a kitchen cabinet or a dresser drawer gives you. Dark alone did not stop the breakdown, which is why the spot should be cool as well as dark.
The longer a package sits between sessions, the more those room temperature results apply to it. If you only want what you will use soon, order a smaller amount ahead for in-store pickup at our Derby store or our Hartford store.
Light, heat, oxygen and humidity affect the stability of terpenes
A 2025 review in Molecules says key factors affecting the stability of terpenes and volatile compounds include light, heat, oxygen and humidity. The review of aroma and flavor research in cannabis explains how three of them work:
- Light. UV and other light wavelengths can catalyze photochemical reactions that break down terpenes.
- Heat. Elevated temperatures accelerate volatilization and degradation of terpenes.
- Oxygen. Oxygen exposure triggers oxidative degradation, particularly in monoterpenes like pinene and limonene.
Flower gets opened every time you grind or roll, so it meets fresh air more often than a sealed package on a shelf. Our guide to cannabis terpenes explains what pinene, limonene and the others are.
Keep it in the original packaging, sealed, dark and cool
DCP tells buyers to store cannabis products in their original packaging, locked up and out of reach of children and pets. That packaging already handles part of the job, because DCP says cannabis packaging must be child-safe, tamper-resistant and light-resistant.
The rest is up to where you put it. Close the package after each use so less air reaches the terpenes. Then pick a spot that stays dark and cool. A lockbox on a closet shelf fits those conditions better than a sunny windowsill or the cabinet over the stove.
The original package also keeps the label with the product. Our guide on how to read a Connecticut cannabis label walks through what each part of it means.
Storing flower, edibles and pre-rolls: what changes by format
Flower. The four-year study tested marijuana and hashish samples, so its THC and CBN results speak most directly to flower. Whatever you pick up from our flower aisle, the package it comes home in is already the right container for it.
Edibles. If you open an edible package one serving at a time, close it again and keep the rest in the original package, where the serving information and the label stay with it. Our comparison of THC drinks and edibles covers how the two formats differ.
Pre-rolls. For what separates infused pre-rolls from regular ones, see our guide on infused pre-rolls vs regular pre-rolls. If you buy a multi-pack, leave the ones you are not smoking yet in the package they came in.
Lock it up and keep it out of sight of children and pets
The CDC advises keeping cannabis products in a locked childproof container and out of the reach and sight of children and pets. Colorado's state cannabis guidance adds a detail worth copying: make sure children cannot see or reach the locked cabinet or box holding cannabis.
The lockbox on the closet shelf covers both, as long as it sits up high and out of view.
Questions shoppers ask about storing cannabis
Does a child-safe package mean I can skip the lock?
No. For an adult 21 or older who keeps cannabis at home, Colorado's safe storage guidance says storage that works for young children may not stop older children or teens, and DCP says to keep cannabis products locked up as well as in their original packaging. The package is one layer of protection. The lockbox is the other, and both belong in a spot out of reach and out of sight.
What do the two symbols on a Connecticut cannabis package mean?
One symbol says the package contains THC and the other says it is not safe or legal for people under twenty-one, and Connecticut requires both as DCP-issued symbols on cannabis labels sold to adults 21 and older. DCP says to store cannabis products in their original packaging, so both symbols stay with the product.
Did the storage study test fridge and freezer temperatures?
Yes. The four-year study kept samples refrigerated at 4 °C and frozen at -20 °C, and found that temperature changed only the speed of THC to CBN conversion. For an adult 21 or older, DCP says to keep cannabis products locked up and out of reach of children and pets, wherever you store them, and in their original packaging.
What wears down the aroma of stored weed?
A 2025 review in Molecules says key factors affecting the stability of terpenes and volatile compounds include light, heat, oxygen and humidity. Light can break terpenes down through photochemical reactions, heat speeds their volatilization, and oxygen triggers oxidative degradation. Those are the four factors the review names as affecting stability.
What is CBN, and why does it show up in stored weed?
The storage study states that CBN is produced from the degradation of THC. Under both room temperature conditions, in light and in darkness, it found significant THC degradation and CBN formation. It also found light changed both the speed and the stoichiometry of THC to CBN conversion.
Where in the house should I keep it?
Keep it in a locked box, in a spot that stays dark and cool and out of sight. The CDC advises a locked childproof container out of the reach and sight of children and pets, and Colorado says to make sure children cannot see or reach the locked cabinet or box. Dark and cool come from the research above.
Order ahead for pickup and store it right when you get home
Our online ordering takes orders at any hour, so you can place an order for in-store pickup whenever it suits you and collect it at the store you chose. We accept cash and debit cards at both stores.
When you get home, put the package, still closed, straight into a dark, cool spot that locks. If you have a question before you order, call us at 860-420-BUDS (2837). More guides on products and formats are on the Hi! People blog.
