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How to Decarboxylate Cannabis
Prep: 5 minutes | Cook: 25–60 minutes | Difficulty: Easy
Decarboxylation ("decarbing") is the process of heating raw cannabis to activate its cannabinoids. Raw cannabis contains THCA and CBDA — the inactive acid forms. Heat converts them into active THC and CBD, making cannabis psychoactive and more therapeutically potent.
This is the essential first step before making cannabis oil, tinctures, or edibles.
⚠️ Heads up: This will make your house smell strongly of weed for a few hours.
Why Decarb?
- Raw cannabis (THCA/CBDA) is not psychoactive and less therapeutically potent
- Heat converts THCA → THC and CBDA → CBD
- Same reaction that happens when you smoke or vaporize, but controlled
- Over-heating destroys cannabinoids; under-heating leaves them inactive
- The "sweet spot" is 230–250°F, low and slow
Supplies
- Cannabis buds (dried and cured)
- Baking sheet or glass baking dish
- Parchment paper
- Mason jar or airtight glass container for storage
- Optional: aluminum foil to cover (traps terpenes)
Instructions
- Preheat oven to 250°F.
- Line a baking sheet with parchment paper.
- Tear or break buds into small pieces (grinding is not necessary). Spread evenly on the sheet.
- Bake according to your strain type:
- THC-dominant strains: 25–30 minutes at 250°F
- Balanced THC/CBD strains: ~45 minutes at 250°F
- High-CBD strains: 50–60 minutes at 250°F (CBD takes longer to convert)
- Lower temp option: 230°F for 45 minutes (preserves more terpenes)
- Alternative: Some sources (Veriheal) recommend 240°F for 45 minutes as a gentler middle ground
- Optional: cover the baking pan with foil or an inverted second sheet to trap cannabinoids and terpenes that may volatilize.
- Remove from oven and allow to cool completely. Cannabis should have changed from green to light brown.
- Transfer decarbed cannabis to a glass airtight container (mason jar works great).
- Store in a cool, dark place. Use within 3–6 months for best potency (1 year max). Over time, THC naturally degrades to CBN (a sleepy cannabinoid).
Tips
- Use fluffy, loose, less-manicured buds — save the pretty ones for smoking
- Cannabis loses some weight during decarb as it dries out — start with a few extra grams
- For a hands-off option, use an infusion machine — it handles decarb and infusion in one device with less smell
- Strains high in both THC and CBD make the most well-rounded oils and salves (the "entourage effect")