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Curing Humidity and Chlorophyll Fade

Curing humidity around 45 to 55 percent lets chlorophyll break down and flavor mellow. Too dry stops the cure. Too wet invites mold.

curing humidity drying
Curing Humidity and Chlorophyll Fade — Marijuana Grower's Handbook, page 680
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What curing does

After the cut

Curing is the short window when harvested flowers still run some cell processes

Chlorophyll fade

As green pigment breaks down, the flower lightens and red, yellow, or purple tones can show

Smoother draw

A real cure plus a slow dry tastes cleaner than a rushed green dry

Three-day life

Cells gradually lose water and die after a few days

Humidity targets

Hold 50 percent: About 50 percent humidity at 60 to 70 F (15 to 21 C) is the working band.

Safe range: Keep curing humidity between 45 and 55 percent.

Stop line: At 40 percent or below, water leaves so fast the cure ends.

Mold line: Excess humidity is an open invitation to rot on dense flowers.

Room control

Dim and moving

Low light and constant air movement are part of the cure, not extras

Air conditioner

A thermostat near 65 F (18 C) cools the room and pulls water from warm outdoor air

Two machines

A dehumidifier and an air conditioner can fight each other on temperature while both dry the air

Patience

The extra days are what separate a mellow flower from a heat-dried one

Optional freeze finish

After a short cure

Freeze drying once cells have run a few days keeps oils and glands still

Home freezer

A frost-free freezer can sublimate ice to vapor over 10 to 20 days

Why it works

Water leaves as vapor without a liquid stage, so glands stay undisturbed

Not a shortcut

This still follows a real cure. It is not a replacement for the humidity window