Cannabis Dry and Cure Humidity Chart: RH by Stage

Top pick: dry at 55% to 60% relative humidity and 60°F to 65°F for 10 to 14 days, then cure at 58% to 62% RH in jars. The chart below uses five criteria: stage, target RH, temperature, airflow or burping, and the plant sign that tells you to move on. Those criteria matter more than a fixed day count because room moisture, bud density, and trim style change the pace.

Cannabis dry and cure humidity chart

• Drying, days 1 to 3: 55% to 60% RH, 60°F to 65°F, gentle indirect airflow. Buds feel damp and leaves are still pliable.
• Drying, days 4 to 10: 55% to 60% RH, 60°F to 65°F, steady airflow with no fan pointed at the flower. Thin stems start to snap.
• Dry finish: 55% to 60% RH, 60°F to 65°F. A thin branch snaps instead of bending, and buds spring back when pressed.
• Cure, week 1: 58% to 62% RH in the jar, 60°F to 68°F. Burp daily for 5 to 10 minutes and watch the jar hygrometer.
• Cure, weeks 2 to 4: 58% to 62% RH, burp every 2 to 3 days. The hay smell fades and the flower smell settles.
• Storage: 58% to 62% RH, below 70°F, dark container. Burp only if RH climbs above 62%.

If jar RH reads above 65%, burp longer and spread the buds out for an hour. If jar RH reads below 55%, the cure has stalled and the flower will stay brittle. A cheap hygrometer in each jar is more useful than a calendar.

Drying at 55% to 60% RH

This is the slow window most home growers can manage without a sealed room. It gives moisture time to leave the center of the bud while the outside stays supple.

Pros

• Steady moisture loss and less risk of a crisp outside around a wet stem.
• Better smell retention than a fast dry in low humidity.
• Easy to monitor with one room hygrometer and a small fan.

Cons

• Needs 10 to 14 days and stable space.
• High humidity in the room can push RH past 60% without airflow.
• Takes more space than wet trimming into small batches.

Use case: a spare room or tent with a hygrometer, indirect fan, and room to hang whole branches. When you buy weed online, ask for the cure RH and harvest date; a seller who tracks moisture is easier to compare than one who lists only THC.

Drying at 45% to 55% RH

A lower RH dry moves faster. It suits damp climates or small harvests that cannot sit in a room for two weeks.

Pros

• Faster turnaround and lower mold risk in a humid space.
• Useful when weather prevents a slow room dry.
• Less demand on airflow equipment.

Cons

• Higher chance of brittle outer flower and a wet stem.
• Fast drying can lock in a hay smell.
• Needs closer checks, sometimes twice a day.

Use case: a wet basement, a small batch, or a grow room with no climate control. Check stems daily and jar early enough to cure at 58% to 62% RH.

Curing at 58% to 62% RH

The cure is a moisture balancing step, not a drying step. This range keeps flower workable while limiting mold pressure.

Pros

• A clear target that works with jar hygrometers.
• Supports a slower cure and a cleaner smell.
• Easy to correct with burping before RH runs high.

Cons

• Requires daily burping in week 1.
• Over-dried flower does not rehydrate evenly.
• Jar RH can climb after a few hours, so one reading is not enough.

Use case: flower that snapped off a thin stem but still feels slightly soft. Jar it, add a hygrometer, and burp until the reading holds near 60% RH.

Curing below 55% RH

This is storage territory, not cure territory. Low RH protects against mold but stops the chemical and moisture changes that make a cure useful.

Pros

• Low mold risk for short-term holding.
• Simple for small amounts used within a few weeks.
• Less burping and less daily attention.

Cons

• Flower turns brittle and loses smell.
• Cure stops, so the smoke stays harsh.
• Rehydrating can bring back moisture unevenly.

Use case: short-term storage or a backup jar for flower you will use soon. For a full cure, bring the jar back to 58% to 62% RH with a proper humidity pack and burp in steps.