Last reviewed November 12, 2026
Farnesene is a terpene with a green, woody smell and a floral edge. One form of it, alpha-farnesene, is the single most abundant aroma compound in some apples at harvest. In cannabis it’s a minor terpene, and no clinical trials have tested what it does in people.
| Aroma | Green, woody, floral, a little vegetal |
|---|---|
| Also found in | Apple skins, hops, tea leaves |
| Forms | Two main forms, alpha and beta, each with closely related isomers |
| Often described in cannabis as | Fruity |
| Everyday uses | Food flavouring and fragrance; beta-farnesene is also used in synthetic rubber manufacturing |
What research says
Most farnesene research is about plants and insects. Fruit scientists study it because, in stored apples, its breakdown products are linked to superficial scald, a browning of the skin. Beta-farnesene is the main or only alarm pheromone in most aphid species. A PubMed search on November 12, 2026 found no clinical trials of farnesene at all, so there is no human evidence behind claims about its effects.
Terpenes don’t get you high: THC does. And no single terpene reliably predicts how a strain will feel; the whole mix of cannabinoids and terpenes, your dose and your tolerance all play a part.
Tasting farnesene
Farnesene is often linked with green apple, and it is an apple compound. A 2024 study of Golden Delicious and Red Delicious apples found alpha-farnesene made up 43% and 48% of their measured aroma compounds at harvest, and it is made mainly in the peel. The compound’s own smell is less fruity than that suggests. The flavour industry’s reference profile lists it as floral and woody with a cooked-vegetable note, and the same apple study credits it with the green, vegetable side of apple aroma. Esters, the biggest group of aroma compounds in those apples, carry the sweet, fruity notes.
It’s also a heavy molecule. Alpha-farnesene boils at about 260 °C, against about 176 °C for limonene. When hemp is steam-distilled, sesquiterpenes, the heavier terpene family farnesene belongs to, come over late in the run. In a strain’s flavour, expect it in the background rather than up front.
Why the amount varies
Farnesene is a small share of a small group. In a 2017 study of 22 plants of one hemp variety, mid-stage flowers held about 389 µg of monoterpenes per gram but only 34 µg of sesquiterpenes, and farnesene averaged 4.4% of those sesquiterpenes, give or take 3.6 points from plant to plant.
Labels don’t predict it well. A 2021 study of 297 cannabis samples found farnesene rose slightly with the sativa share reported for each sample, but that share explained only about 11% of the variation, and the same study found sativa and indica labels didn’t track the plants’ genetics. Growing, curing and storage change it too, and only a lab terpene report shows what a batch holds.
Common questions
What does farnesene smell like?
Green and woody with a floral edge. Flavour references also list a cooked-vegetable note.
Is farnesene in green apples?
It’s in apple skins generally, not only green apples; the 2024 study measured it in Golden Delicious and Red Delicious. On its own it smells green rather than sweet.
Does farnesene get you high?
No. Farnesene isn’t intoxicating; the high comes from THC.
What’s the difference between alpha- and beta-farnesene?
They share a formula, C15H24, with the atoms arranged differently. Alpha is the apple-peel form, and beta is found in hops and works as an aphid alarm signal.
