The core DIY cannabis vape juice recipe is decarboxylated cannabis infused into propylene glycol at 160°F to 180°F for one to two hours, strained, then cut with a smaller amount of vegetable glycerin. Propylene glycol carries the cannabinoids; vegetable glycerin mostly adds vapor volume and sweetness. The finished liquid goes into a glass cartridge, never a plastic pod or a repurposed nicotine tank.
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What does a basic cannabis vape juice recipe require?
You need decarboxylated flower or a winterized concentrate, propylene glycol (PG), vegetable glycerin (VG), a sealed glass jar, a thermometer, a fine strainer, and a syringe for filling carts.
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- PG to VG ratio: start at 3:1 and push VG no higher than 30 percent for cartridge use.
- Heat source: a water bath, double boiler, or sous vide circulator. Open flame is a hard no.
- Container: borosilicate glass. Cannabinoids bind to plastic and leach from it.
- Strainer: 25 micron mesh or an unbleached paper coffee filter.
Does decarboxylation matter for vape juice?
Yes. Raw cannabis holds THCA, which is not intoxicating until heat removes a carboxyl group and converts it to THC. A common range is 240°F for 30 to 45 minutes in a sealed jar, though time and temperature trade off against each other.
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Overheating pushes THC toward CBN, which reads as sedating and dull rather than sharp. Underheating leaves THCA behind and your liquid tests weak.
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Why does propylene glycol do the heavy lifting?
PG dissolves cannabinoids and terpenes far better than VG does. A high-VG mix separates within days, clouds the liquid, and clogs coils as waxes and lipids crash out of solution.
VG still earns a place because it produces thicker, smoother vapor and softens the throat hit PG creates. Treat it as a thinner, not as the base.
How do you infuse cannabis into vape liquid step by step?
- Decarboxylate your material in a sealed glass jar at 240°F for 30 to 45 minutes.
- Add PG at roughly 1 mL per gram of flower, seal, and heat at 160°F to 180°F for one to two hours, swirling every 20 minutes.
- Strain warm through 25 micron mesh. Squeeze gently. Do not grind finer to chase yield.
- For a cleaner cart, winterize: dissolve in ethanol, freeze 24 hours, filter out the waxes, then evaporate the ethanol off.
- Stir in VG and, if you use them, cannabis-derived terpenes at 2 to 5 percent by volume.
- Rest the mix 24 to 48 hours in amber glass so the emulsion settles before filling.
What should never go into DIY cannabis vape juice?
Vitamin E acetate is the additive tied to the 2019 EVALI outbreak and belongs nowhere near a cartridge. MCT oil, coconut oil, and other lipids are sold as thinners but carry inhalation risk that oral safety data does not cover.
Skip polyethylene glycol blends, butter or cream flavorings that carry diacetyl, oil-based citrus or cinnamon flavorings, and any additive not labeled for inhalation. If the label says food grade only, it is food grade only.
Is DIY juice actually worth it next to a dispensary cart?
It comes down to what you value. A dispensary cart wins on convenience and on lab testing for pesticides, residual solvents, and potency accuracy.
DIY wins on cost per milligram and on control over strain, ratio, and additives. It loses on consistency, batch-to-batch potency guessing, and clogged hardware.
How long does DIY cannabis vape juice last?
Stored in amber glass away from heat and light, the mix holds up roughly 6 to 12 months. Oxidation darkens the liquid and flattens the flavor over time. Separation or a film on the glass means the emulsion broke and the cart will likely clog.
Frequently asked questions
Can you make cannabis vape juice with glycerin only?
You can, but the result is weak. VG extracts cannabinoids poorly, so most of the THC stays in the plant material. Expect a thin effect and heavy coil gunk.
How strong should DIY vape juice be?
There is no standard, which is the real hazard. Track your starting material weight, your final volume, and your assumed THC percentage so a single pull has a known dose range. Titrate slowly, because vaping hits in minutes, not hours.
Is homemade vape juice legal?
Legality follows your state, not the recipe. Home extraction with ethanol or heat is treated differently from possession in some states, and selling untested vape liquid is illegal in most legal markets.