Cannabis drying and curing techniques cover two separate stages, and both matter. Drying removes most of the water from fresh flower over roughly 7 to 14 days in a dark, ventilated space kept near 60 to 70°F and 55 to 62% relative humidity. Curing then seals that dried flower in jars for 2 to 8 weeks, opening them on a schedule, so leftover moisture spreads evenly and plant starches, sugars and chlorophyll break down.
Get the order right and the flower keeps its aroma, taste and cannabinoid content. Rush either stage and you risk a hay smell, a harsh smoke, or mold that ruins the whole batch.
cannabis drying and curing process
Drying versus curing: what each stage does
These are not the same job, and skipping one leaves the other unable to work.
- Drying is the moisture removal phase. Air movement and moderate humidity pull water out of the stems and buds slowly enough that the outside does not dry into a crust while the center stays wet.
- Curing is the stabilization phase. Once moisture is low enough that mold cannot grow, sealed jars let the remaining humidity redistribute from the stems into the buds while enzymes and microbes finish breaking down harsh compounds.
Slow drying followed by a patient cure is the difference between flower that smells like fresh pine and citrus and flower that smells like cut grass.
cannabis drying and curing tips
Ideal conditions for drying cannabis
Control the room, not just the plant. Drying is driven by the environment around the buds.
- Temperature: 60 to 70°F. Hot rooms dry the outside too fast and drive off volatile terpenes.
- Relative humidity: 55 to 62%. Below 50% the buds dry brittle, above 65% mold pressure climbs.
- Airflow: Gentle indirect movement. A small fan pointed at a wall or floor beats a fan aimed at the buds, which causes uneven, fast drying.
- Light: Total darkness or dim light. UV exposure degrades cannabinoids and terpenes.
- Layout: Hang whole plants or branches on a line, or use a drying rack with space between buds so air reaches every side.
Most flowers finish in 7 to 14 days. Check daily after day five. The classic test is the stem snap: a small stem should crack cleanly instead of bending like a rubber band. Buds should feel dry on the surface with a slightly spongy center.
How to cure cannabis in a jar
- Confirm the flower is dry enough that stems snap. Curing wet flower in a sealed jar grows mold.
- Fill glass jars about three quarters full. Leave headspace for air.
- Drop in a small hygrometer. The target inside the jar is 58 to 62% relative humidity.
- Burp the jars by opening the lid for 5 to 10 minutes. During the first week, do this twice a day. Move to once a day in weeks two and three, then once a week.
- Watch the hygrometer. Above 65%, empty the jar and dry the buds further. Below 55%, the cure has stalled and a humidity pack can bring it back.
- Continue for at least 2 weeks for a basic cure and 4 to 8 weeks for full flavor development.
Common mistakes and warning signs
- Ammonia or hay smell: the jar was sealed too wet. Burp more often and check for mold.
- White fuzz, gray patches or a musty odor: mold. Discard affected material rather than trying to salvage it.
- Crumbly, dusty buds: overdried. The cure stops once moisture is gone.
- Jars packed tight: no air exchange, higher mold risk.
- Heat or sunlight during storage: accelerates terpene loss and cannabinoid breakdown.
Does curing change CBD and THC?
The plant is still chemically active after harvest. Terpenes are volatile, so heat, light and oxygen all reduce them, and long storage can shift THC toward CBN over time. Peer-reviewed reviews of post-harvest handling describe these changes as a function of temperature, humidity, light exposure and storage length, which is why a controlled dry and cure preserves more of the compounds people actually want. For high-CBD flower used in teas, tinctures or vaporizers, the same rules apply: cool, dark and steady.
Storing cured cannabis
Keep cured flower in glass jars in a dark cabinet at 60 to 70°F with a humidity pack holding 58 to 62%. Avoid plastic bags, which flatten trichomes and let aroma escape, and skip the refrigerator or freezer unless you are storing long term and can prevent condensation. A clean, well-labeled jar with the harvest date makes it easy to track how the cure is developing.
Quick answers
How long does drying take?
Usually 7 to 14 days, depending on bud density, room humidity and airflow. Check daily rather than trusting a calendar.
Can you cure without burping?
Not safely. Burping releases trapped moisture and gases. Sealed jars that never open are the fastest route to mold.
What humidity should cured flower sit at?
58 to 62% relative humidity is the working range most growers aim for in storage.