Myrcene is the most abundant monoterpene in most cannabis cultivars, typically making up 0.1% to 2% of dried flower weight and often 20% to 50% of the total terpene profile. On a lab report, a 1% myrcene reading means about 10 mg of myrcene per gram of flower. Levels rise as the plant matures and fall with heat, oxygen, and long storage, so the same cultivar can test differently from one harvest to the next.
How much myrcene is in cannabis flower?
Most commercial flower tests between 0.1% and 0.8% myrcene by dry weight, with standout chemovars pushing past 1%. Concentrates shift the scale because terpenes are concentrated along with cannabinoids.
Myrcene Entourage Effect: How This Terpene Changes Your High
- Low: under 0.1%, common in sativa-leaning, citrus-forward cultivars.
- Average: 0.1% to 0.5%, the range seen on most retail labels.
- High: 0.5% to 2%, typical of earthy, musky, sedative-leaning flower.
- Very high: above 2% in flower, uncommon, and 1% to 20% or more in live resin, sauce, and terpene-rich extracts.
What determines myrcene content in a cultivar?
Genetics set the ceiling, but growing and handling decide how close the plant gets to it. Two plants with identical DNA can finish several times apart in myrcene.
Myrcene Benefits and Side Effects
- Genotype: terpene synthase genes define which monoterpenes a chemovar can produce and in what ratio.
- Harvest timing: monoterpenes like myrcene usually peak near trichome maturity and can decline if plants sit past their window.
- Environment: light intensity, UV exposure, temperature swings, and drought stress all nudge terpene output.
- Dry and cure: slow drying at roughly 60 to 70 degrees Fahrenheit with 55% to 60% relative humidity preserves volatile terpenes.
- Storage: heat, light, and air exposure oxidize myrcene within weeks.
How is myrcene content measured?
Analytical labs use gas chromatography to separate terpenes and quantify each one. Flame ionization detection (GC-FID) handles routine potency and terpene panels, while mass spectrometry (GC-MS) confirms identity. Most labs report individual terpenes as a percentage of dry weight with a limit of quantitation near 0.01%.
Does myrcene cause couch lock?
The sedative reputation comes largely from animal research, including a 1997 mouse study where high myrcene doses produced sedation and muscle relaxation. Human evidence remains thin, and flower that tests high in myrcene often also tests high in THC and was harvested later, which muddies the picture. Most researchers treat myrcene as one contributor to the entourage effect rather than a solo switch for drowsiness.
What does myrcene smell and taste like?
Myrcene reads as earthy, musky, and herbal with a clove and ripe citrus edge. It is the dominant volatile in hops, lemongrass, mango, thyme, and bay leaf, which is why those aromas show up in tasting notes for myrcene-heavy flower.
At what temperature does myrcene vaporize?
Myrcene boils near 167 degrees Celsius, or about 332 degrees Fahrenheit. Dry herb vaporizers set between 330 and 360 degrees Fahrenheit release it well, while combustion destroys a large share of it.
Does myrcene degrade over time?
Yes. Myrcene is a volatile monoterpene that oxidizes when exposed to air, heat, and light, and measurable loss can occur within weeks of a poor cure or an open jar. Airtight glass, a dark shelf, and 55% to 62% relative humidity slow the decline.
How do you read myrcene on a cannabis label?
Look for a total terpenes figure plus individual percentages, then compare myrcene against the other listed terpenes. A label showing 0.6% myrcene out of 1.8% total terpenes tells you myrcene dominates the aroma profile. Treat the number as a guide to smell and flavor more than a promise about effects, and ask a budtender for the latest batch panel if the label is missing.