Once opened, cannabis edibles last anywhere from one week to a year depending on the type. Gummies and hard candies hold up the longest at six months to a year in proper storage, while baked goods like brownies and cookies stay fresh for only one to two weeks in the refrigerator. The bigger concern for most people isn’t safety but potency: THC degrades steadily over time, and how you store your edibles after opening makes a significant difference in how strong they remain.
Shelf Life by Edible Type
The ingredients in your edible determine how quickly it goes bad. Sugar-based products like gummies and hard candies contain very little moisture, which means bacteria and mold have less to work with. Stored in a cool, dark, dry place, these can last six months to a full year after opening. They may get a bit stale or sticky over time, but they remain safe to eat far longer than most other edible formats.
Baked goods are a different story. Brownies, cookies, and cakes contain butter, eggs, flour, and moisture, all of which spoil the same way their non-cannabis counterparts do. Expect one to two weeks in the refrigerator. If you won’t finish them in that window, freezing is your best option.
Cannabis-infused oils and butters last about three to four weeks when refrigerated. Infused beverages should also be refrigerated after opening and used relatively quickly, as liquid products are more vulnerable to bacterial growth once the seal is broken.
How Fast THC Loses Potency
Even if your edible still looks and tastes fine, its THC content is quietly declining. Lab testing from Anresco Laboratories found that THC decreased by roughly 12% within the first 30 days of storage and by about 35% over a full year. Those numbers come from cannabis stored at room conditions, so your results will vary based on temperature, light exposure, and how airtight your container is.
CBD follows a similar pattern. When stored at room temperature (around 70°F), CBD can degrade by up to 20% within six months. The takeaway: your six-month-old gummies aren’t worthless, but they won’t hit the same way a fresh one does. If you notice an edible feels weaker than expected, degradation is the likely explanation, not a bad batch.
Why Storage Method Matters
Three things accelerate THC breakdown: heat, light, and oxygen. Once you open the original packaging, you’re introducing all three unless you take steps to limit exposure. Edibles stored in airtight containers or glass jars retain their potency significantly longer than those left in torn-open bags, plastic wrap, or paper packaging. Glass is ideal because it’s non-porous, meaning it doesn’t absorb odors or allow tiny amounts of air to pass through the way some plastics do.
If you’re transferring edibles to a new container, look for a glass jar with a tight-fitting lid. Mason jars work perfectly. The goal is to block air, moisture, and light from reaching the product. A dark cabinet or drawer is better than a countertop, even if the container itself is sealed.
Refrigerating vs. Freezing
Refrigeration slows degradation across all edible types. Temperatures between 35°F and 40°F keep cannabinoids more stable than room temperature storage, and they also prevent baked goods from spoiling as quickly. For gummies you plan to finish within a few months, the fridge is all you need. Just make sure they’re in a sealed container so they don’t absorb fridge odors or pick up moisture.
For longer storage, freezing is the most effective option. Low temperatures essentially pause the chemical breakdown of THC. Freezing doesn’t damage the cannabinoid structure or reduce potency on its own. Properly sealed gummies can maintain their freshness and strength in the freezer for six months to over a year. Baked edibles freeze well too, just as regular brownies or cookies would.
The key to freezing successfully is wrapping edibles tightly before placing them in a freezer-safe container. This prevents freezer burn and keeps moisture out. When you’re ready to eat one, let it come to room temperature before opening the packaging. Opening it while still cold can cause condensation to form on the surface, which introduces the moisture you were trying to avoid in the first place.
Signs Your Edible Has Gone Bad
Potency loss is gradual and invisible, but actual spoilage is easier to spot. For baked goods, look for the same signs you’d check in regular food: mold, an off smell, a stale or sour taste, or a change in texture. If a brownie feels slimy or smells wrong, toss it.
Gummies are more forgiving. They rarely become unsafe, but they can dry out, harden, or develop a grainy texture over time. Sugar may crystallize on the surface, giving them a whitish coating. This is cosmetic, not dangerous, but it’s a sign the product is past its prime. If gummies have melted and re-solidified (from heat exposure), their texture will be off and their potency may have taken a hit from the temperature swing.
Infused oils that smell rancid have oxidized and should be discarded. Rancid oil won’t necessarily make you sick in small amounts, but it tastes terrible and the cannabinoids have likely degraded significantly by that point.
Quick Storage Guide
- Gummies and hard candies: 6 to 12 months in a sealed glass jar at room temperature, longer if refrigerated or frozen.
- Brownies, cookies, and baked goods: 1 to 2 weeks refrigerated, up to 6 months frozen.
- Infused oils and butters: 3 to 4 weeks refrigerated, several months frozen.
- Infused beverages: Refrigerate after opening and consume within a few days to a week.
Whatever the format, airtight glass containers stored in cool, dark locations will always outperform open bags on a countertop. If you buy edibles in bulk or don’t consume them frequently, freezing individual portions is the simplest way to keep them potent for months without worrying about waste.