Drying & Curing Schedule.
Drying & Curing Schedule Designer
Day-by-day RH and temperature curve for proper drying and curing. Preserve volatile compounds; manage botrytis risk; finish strong.
Why drying matters
Drying is the most under-appreciated stage in cultivation. Plants that finished beautifully in flower can lose 20-40% of their value in a botched dry: harsh smoke / flavor, chlorophyll-tasting, lost terpenes (the volatile aromatic compounds that give cultivars their character), or worse — botrytis and mold rendering the harvest unsalvageable.
The goal of drying is to remove water from plant tissue at a controlled rate that preserves volatile compounds and prevents microbial growth. Too fast: terpenes evaporate, chlorophyll doesn't break down, the product is "hay-like." Too slow: mold grows. The sweet spot is roughly 14-21 days at 60-65°F, 55-65% RH.
Why curing matters
Even after drying to ~10-12% moisture content, the harvest isn't done. Curing is the slow finishing stage where:
- Residual chlorophyll continues to break down (the "harsh / hay" character fades)
- Cannabinoid acid forms convert (THCA → THC slowly; CBGA → CBG; etc.)
- Terpene profiles develop and stabilize
- Moisture redistributes within the plant material (no more "wet pockets")
- The product reaches its final flavor / aroma character
Curing typically happens in sealed containers (jars, food-grade buckets, mylar-lined bags) at 60-65°F, with periodic "burping" (briefly opening containers to exchange air) for the first 2-3 weeks. Total cure time ranges from 4 weeks (acceptable) to 12+ weeks (premium).
RH targets in containers
| RH in container | State | Result |
|---|---|---|
| 70%+ | Too wet | Mold risk; needs to dry more before sealing |
| 62-65% | Sweet spot | Flavor preservation; safe long-term storage |
| 58-62% | Drier | Some terpene loss but safe; common commercial range |
| 55-58% | Dry | Increased terpene degradation; brittle |
| < 55% | Over-dried | Significant terpene loss; brittle; often needs rehydration |
Boveda 62 packs (62% RH humidity packs) are the simplest container-RH stabilizer; they release or absorb moisture to maintain ~62% RH inside the container. For long-term storage, 58-62% Boveda packs are common.
Equipment recommendations
- Dedicated drying room — separate HVAC or dehumidifier-based RH control; 60-65°F, ~60% RH
- Hygrometer in drying room — Govee H5074 ($15) reads RH and temp continuously; pairs with phone for alerts
- Hygrometer in cure jars — small wireless hygrometers (Govee, SensorPush) reach into jars
- Boveda packs — 62% or 58% RH stabilization
- Glass jars / food-safe buckets — for curing
- Dehumidifier (if drying room is ambient-humid) — Quest, Anden, IPS commercial-grade
- Gentle airflow — small oscillating fan on indirect setting; avoid blowing directly on hanging product
Common drying mistakes
- Drying too fast (warmer / drier room) — terpenes evaporate; chlorophyll doesn't break down properly; product is harsh
- Drying too slow in high-humidity room — mold risk, especially botrytis on dense flowers
- Direct fan flow on product — accelerates outer drying while inside is still wet; "case hardens"
- Sealing too soon — wet pockets inside dense flowers; mold blooms in cure containers
- Sealing too late — over-dried; brittle; lost volatiles
- Stem-snap test only — small stems snap before main stems; trust hygrometer over stem snap for cure decisions
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