Decarb Guide

Combustion · Vaporization · Decarboxylation
Understanding THC Activation

Spring 2026 · San Diego · Raw Garden · Box Lunch

The Premise

Raw cannabis isn't psychoactive

THCa → heat THC + CO₂
WhatDetail
Raw flower containsTHCa (inactive)
Heat converts it toTHC (active)
Weight loss factor× 0.877
Activation temp220–245°F (105–120°C)
THC must be heated to become psychoactive. All three methods do this differently.

Three Ways to Activate

All require heat — very different results

MethodHow It Works
Combustion
Smoking
Flame ignites flower
~1475–1830°F (~800–1000°C)
Vaporization
Vaping
Heats oil to aerosol
320–445°F (160–230°C)
Decarboxylation
Eating
Low heat converts THCa
220–250°F (105–120°C)
Same goal, very different efficiency, cost, and experience.

Why Decarboxylate?

Just eat your cannabis and feel the effects

6–8+ hrs
Duration
Potency (11-OH-THC)
BenefitDetail
Stronger effect11-OH-THC: 1.5–7×
Lasts longer6–8+ hrs vs 2–4
Cheapest per dose~9× more THC / $
No smoke / vaporLung-safe
Your liver converts Delta-9 to 11-OH-THC — crosses the blood-brain barrier more efficiently.

Instant Pot Method

Mason jar + steamer rack + high pressure

1
Load Jar
Coarse-ground flower in mason jar
2
Finger-Tight
2-piece lid, snug NOT torqued
3
Add Water
~1 inch below steamer rack
4
Center Jar
Stable on rack, won't tip
5
3 Hrs / High
~240°F (~115°C) locked by steam
6
Nat. Release
Never quick-release
7
Cool & Open
Terpenes re-condense
!
±2°F (±1°C)
Oven is ±15–20°F (±8–11°C)

Products Compared

Same flower, three formats

ProductKey Specs
Joint
Raw Garden · Raspberry Haze
1 g · 281 mg THC
Price: $19 OTD
Vape
Raw Garden · Ze Chem
1 g · 815 mg THC
Price: $51 OTD
Flower
Box Lunch · Blue Dream
14 g · 3,548 mg THC
Price: $25 OTD
Combustion → Joint  |  Vaporization → Vape  |  Decarboxylation → Flower

Combustion

Smoking bioavailability

~15%
Bioavailability
532 mg
THC Absorbed
1–3 min
Onset
2–4 hrs
Duration
StageTHC
Available THC3,548 mg
After all losses532 mg
Wasted85%
Lost to flame, sidestream smoke, and exhalation

Vaporization

Vaping bioavailability

~40%
Bioavailability
326 mg
THC Absorbed
1–3 min
Onset
2–3 hrs
Duration
No pyrolysis — oil heated to 320–445°F (160–230°C), just enough to aerosolize. 70–90% terpene survival vs 30–50% combustion. Closed system — no sidestream loss.

Decarboxylation

Bioavailability when eaten

~8%
Bioavailability
275 mg
THC Absorbed
1–2 hrs
Onset
6–8+ hrs
Duration
Liver converts Delta-9 to 11-OH-THC1.5–7× more potent (conservatively 2×). Crosses blood-brain barrier more efficiently.

Cost Per mg THC

How far each dollar goes

6.85¢
Combustion
6.29¢
Vaporization
0.70¢
Decarb
To match flower THCCost
1 bag flower (decarbed)$25
4.35 vape carts$223 (8.9×)
12.63 joints$243 (9.7×)
Decarboxylation gives ~9× more THC per dollar than combustion or vaporization

Benefits to Decarboxylating

Decarb wins: more potent, longer lasting, cheapest per unit

MethodPsych. Equiv.
Combustion (14 g)532 mg
Vaporization (1 g × 4.35)326 mg
Decarboxylation (14 g)551 mg (2×)
21.3
Combustion
units / $1
6.4
Vaporization
units / $1
22.0
Decarb
units / $1

Decarb Methods

Oven vs Instant Pot vs Sous Vide

°F (°C)OvenIPSV
Temp220–245 (105–120)~240 (~115)~203 (~95)
Stable±20 (±11)±2 (±1)±0.1 (±0.05)
Time30 min3 hrs1–4h
Convert~97%95–100Varies
CBNMedV. LowNegl.
TerpsLowHighBest
OdorBadNoneNone
Also valid: “90 at 90” — 195°F (90°C) / 90 min (wider CBN margin)

Ways to Enjoy

Once decarbed, just eat it — the options are endless

MethodNotes
EdiblesMix into butter, oil, or honey
CapsulesPre-dosed, discreet, portable
TincturesUnder tongue for faster onset
DrinksCoffee, tea, smoothies
SprinkleDirectly on food — already active
Start low (5–10 mg). Wait 2 hours before re-dosing. Effects last 6–8+ hours.
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