After cutting down marijuana plants at harvest, a proper dry and cure are crucial for buds.
These processes help preserve and accentuate flavors by retaining terpenes and cannabinoids, while diminishing chlorophyll and getting rid of the vegetal taste of the plant.
The drying process is the initial drying of buds, which usually happens in the open air—freshly harvested plants can lose up to 75% of their weight to moisture loss, as well as sticks, stems, branches, and leaves that get trimmed off.
When dry trimming, drying happens first and then buds are trimmed; in wet trimming, vice versa.
A dry shouldn’t be too quick or too long: Too quick and the outside of buds will appear dry but the insides won’t be; too long and buds could develop mold.
When buds are trimmed and dried, they are placed in airtight containers for curing. This stops the loss of moisture, preserving flavors and aromas and allowing buds to take on their full flavor.
How long does it take to dry cannabis?
Drying takes about 2-7 days. The process is usually shorter when wet trimming because most of the plant material is trimmed away first and there is less plant to dry.
When dry trimming cannabis, you can hang harvested plants upside down on a line or hanger, either whole plants or branches—this prevents buds from getting flattened or misshapen as they dry.
When wet trimming, you’ll place trimmed buds on a drying rack.
Whether wet or dry trimming, check drying buds or branches after two days by bending a branch or stem—if the stem snaps, that means buds are fully dry. If they don’t snap, leave them and check the next day.
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How to set up a cannabis drying room
What makes for a good drying room?
A good drying room will need to be dark with temperatures between 15-21°C and humidity between 55-65%. A cheap hygrometer will help you monitor these numbers.
Depending on your house or property, you may be limited in what you can use for a drying room. Know that it can be hard to control temperature and humidity in big rooms. Also, know that the room will smell like weed. Be sure the space you choose doesn’t have huge fluctuations in temperature and humidity.
Add a small fan to circulate air, and you may need to add a dehumidifier or AC as well. If it’s taking too long to dry buds in your space, you may need to adjust the temperature or humidity to help the drying process.
How dark should a drying room be?
UV rays from sunlight can degrade cannabis, so for optimal drying, keep your space dark. If you don’t have a light-tight space, cover your buds.
It’s OK to open the door and check in on the buds, but prolonged light exposure can quicken drying.
Cannabis drying room equipment
- Drying rack or line to hang buds for drying
- Hygrometer to measure temperature and humidity
- Fan
- AC unit (optional)
- Dehumidifier (optional)
How to hang dry buds
Hang drying buds is less labor intensive but takes up more space. It involves cutting off big branches, or even hanging whole plants upside down. This saves time because you don’t have to “buck,” or remove individual buds off of branches, but as there is more plant hanging, drying this way will take up a lot more space.
Another downside to hang drying is that buds may take longer to dry as there is more plant matter, i.e., branches, stems, stalks, and fan leaves.
How to dry buds without hanging on a line
When trimming wet, you’ll need a flat rack—you’ll have lots of trimmed individual buds, so you can’t hang them. Flat racks are circular with layers of mesh, and are great for airflow.
Check wet-trimmed buds drying in the flat rack after 2-3 days by giving them a little squish. If they’re still too wet, leave them and check again the next day.
How to cure marijuana
When buds are done drying and have been trimmed, the initial amount of moisture is out and it’s time to cure your weed.
For curing, you’ll be storing finished buds in containers—typically airtight glass jars—to stop the loss of moisture, and to preserve flavors and aromas. Curing usually takes two weeks to a month, and humidity inside curing containers needs to be between 55-65%.
Why curing cannabis is important
The curing process is possibly the most overlooked aspect of growing weed. During curing, moisture continues to draw from the center of the bud toward the outside.
Curing affects the flavor and quality of the smoke. Many terpenes, which give cannabis its unique smell and flavor, are quite sensitive and can degrade and evaporate at temperatures as low as 50°F. A slow cure at low temperatures will preserve terpenes better than a quick, hot dry.
A proper cure also allows you to store weed for long periods without worrying about mold, or cannabinoid or terpene degradation. Well-cured flower can be stored in an airtight container in a cool, dark place for up to two years without significant loss of potency.
What does curing do to weed?
Curing helps finish off buds, improving their taste and smell. During curing chlorophyll continues to break down, getting rid of a vegetal taste—without curing, weed would taste like a freshly cut lawn. This loss of chlorophyll makes buds less harsh and smoother to smoke.
Equipment and tools needed to cure cannabis
When curing cannabis, it should be done in a room or space that has a stable temperature and humidity—dank, wet basements or hot, muggy attics aren’t ideal. The space should maintain room temperature and not be too humid.
Light can also degrade terpenes, so it’s ideal to be able to turn off the lights in the space or be able to cover jars so light doesn’t leak in.
To cure buds, you will need:
- Airtight jars
- Hygrometer (for each jar) to measure temperature and humidity
Curing cannabis buds
Once buds are dry, it’s time to cure them.
Place the trimmed buds into some type of airtight container. Most people use wide-mouth quart or half-gallon glass mason jars, but you can also use ceramic, metal, or wood vessels.
Plastic bags aren’t good for curing as they are not impervious to oxygen. Also, you don’t want your weed tasting like plastic.
Pack buds loosely in containers without compacting or crushing them. Seal containers and store in a cool, dry, dark place.
Within a day or two you’ll notice buds get a little softer as moisture from the middle of the buds rehydrates the outer parts. If this doesn’t happen, you have likely over-dried your cannabis.
Humidity inside sealed jars should be 55-65%. If you’re unsure, you can also buy a digital hygrometer—which measures moisture—available for $20 or so at any hardware store.
If buds are too dry, you can add a humidity pack, such as a Boveda pack, to rehydrate buds.
If buds are too wet, leave the lid off for half a day or a full day before resealing them. Be sure to check humidity levels every day and leave the lid off for a period of time if they still are too wet.
Burp your buds
During the first week of curing, regardless of humidity level, open the containers once or twice a day for a couple minutes—this is called burping. This releases moisture and replenishes oxygen inside the container.
If you notice an odor of ammonia when opening a container, it means the buds are not dry enough and anaerobic bacteria are consuming them, which will lead to moldy, rotten cannabis. Leave the lid off for a day and reseal tomorrow.
After the first week, burp containers only once every few days.
How long does it take to cure cannabis?
After two to four weeks in containers, your cannabis should be cured enough to give you a flavorful, aromatic, and quality experience. Some people prefer to cure for four to eight weeks, and some strains even benefit from six months or more of curing.
How to store your harvested cannabis buds
After curing cannabis, you can store buds for up to two years without much loss of potency. Like fine wine or a whiskey barrel, properly dried and cured cannabis is best when kept in a cool, dark place—mildew and other molds on cannabis and organic matter thrive in temperatures between 25-30°C.
Excessive heat can dry out cannabinoids and terpenes that have taken months to develop. When these essential oils get too dry along with plant material, it can result in a hot, harsh smoke.
Here are some tips for storing buds:
- Store out of direct sunlight in a cool, dry place
- Store in neutral containers, like glass mason jars
- Use hygrometers or products like a Boveda pack to monitor and control humidity levels
- Vacuum seal jars and containers to minimize oxygen exposure
- Separate strains to maintain individual flavor profiles, and label with a date—it sucks to mix up strains
Temperature
Low temperatures slow decarboxylation, the process in which THCA converts into the intoxicating THC. THC eventually degrades into CBN, a cannabinoid with different effects and properties. Additionally, warm air holds more moisture than cold air.
Humidity
Humidity control is paramount to keeping mildew and other mold contaminants out of your cannabis. Keep cannabis between 55-65% relative humidity when stored to maintain and enhance color, consistency, aroma, and flavor.
Light
Harmful UV rays break down many organic and synthetic materials, and UV rays will degrade cannabis over time. Storing cannabis out of direct light will also help control temperature.
Drying & curing FAQ
How do you dry and cure buds fast?
We recommend taking your time with drying and curing. A slow dry and cure will greatly improve the flavor and aroma of your bud and reduce harshness.
Equipment such as fans, ACs, and dehumidifiers can help control temperature and humidity in a drying space, ensuring a smooth and consistent dry and cure.
What humidity should buds be dried to before curing?
Keep humidity between 55-65%, and temperatures between 15-21°C
Should buds be completely dry before curing?
Buds should not be completely dry before curing; if they’re too dry, they will have a harsh smoke. Drying should remove a large amount of moisture, and a little more moisture will be pulled out during curing.
How do you dry sticky buds?
The same as any buds—on a drying rack or by hang drying. Stickiness on buds refers to the amount of trichomes they have, not moisture.
What does it mean when you burp weed?
When curing buds, the jar needs to be opened up every few days or so to release moisture and replenish oxygen inside the jar—this is called “burping.”
Is burping weed important?
Yes; moisture needs to be released and fresh air allowed back in every few days.
Will my weed taste better after curing?
Yes; curing “finishes off” weed, pulling out the last bit of moisture and breaking down chlorophyll. This produces a smoother smoke and improves taste, flavor, and aroma in the weed.
Should I dry cannabis with a fan?
Fans can help regulate temperature and humidity in a drying room—reducing temps if it’s too hot and increasing airflow. Humidity should be 55-65% and temperatures 15-21°C; if your drying room is at these, you likely don’t need a fan, only if your dry space goes above these ranges.
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