Drying is where more cannabis quality is lost than any other stage. A perfectly grown, trichome-covered bud can end up smelling like hay and tasting harsh if the dry is too fast, too hot, or too uncontrolled. Conversely, a mediocre grow dried slowly in perfect conditions produces surprisingly smooth, flavorful flower.
The variables are simple — temperature, humidity, airflow, and time. The execution is where growers diverge into different techniques, each with trade-offs.
The science of drying
What's happening
When cannabis dries, three processes occur simultaneously:
- Water evaporation — moisture moves from the interior of the bud to the surface and into the air. The goal is to reduce moisture content from ~80% at harvest to ~10–12% for curing
- Chlorophyll breakdown — chlorophyll degrades into colorless compounds. This is what eliminates the "green" taste. It happens faster in the dark and at moderate temperatures
- Terpene preservation (or loss) — terpenes are volatile. High temperatures, direct light, and fast airflow accelerate terpene evaporation. The slower and cooler the dry, the more terpenes survive
The target environment
| Variable | Target | Why |
|---|---|---|
| Temperature | 60–65°F (15–18°C) | Slows evaporation, preserves terpenes |
| Humidity | 55–62% RH | Controls evaporation rate — too low = too fast |
| Airflow | Gentle, indirect | Prevents case-hardening (dry outside, wet inside) |
| Light | Total darkness | Light degrades THC and accelerates chlorophyll breakdown unevenly |
| Duration | 10–14 days | Slow drying = best quality |
What goes wrong at wrong temperatures
| Temp | Effect |
|---|---|
| Below 55°F | Drying stalls. Mold risk increases dramatically |
| 60–65°F | Ideal. Slow, even drying. Maximum quality |
| 66–72°F | Acceptable. Faster drying (7–10 days). Slight terpene loss |
| Above 75°F | Too fast. Hay smell, harsh smoke, significant terpene loss |
| Above 85°F | Destroys terpenes and degrades THC. Do not dry above 85°F |
Technique 1: Whole-plant hang dry (recommended)
How it works
Harvest the entire plant (or individual branches). Remove large fan leaves but leave sugar leaves intact. Hang the plant or branches upside down from a line or rack in the drying space.