№ 03 · CYAN EDITION
Terpenes: why your nose knows more than the label
28 September 2026 · 4 min read
You open the jar, and a lot is clear before the first draw. The aroma of a bud is made by terpenes, about twenty volatile molecules, the same ones you smell in citrus, pine, pepper and mango. Their combination decides where the same THC will take you.
What terpenes are
Terpenes are the aromatic compounds of the plant. THC gives the high, and terpenes change its character: according to research, they act on the same brain systems that THC works through. In 1998 the chemist Raphael Mechoulam called this the entourage effect: cannabinoids and terpenes together give what none of them gives alone. That is why pure isolated THC and a living strain with the same percentage feel different. Science is still working out the details, but the direction holds up.
Why the THC percentage does not describe a strain
The label says 28%, and it seems all the strength is in that number. The number shows how much THC is in the bud and nothing else. A high percentage without aroma gives a flat draw, strong and without nuance. An 18% strain with a bright smell reads deeper and unfolds over time.
The effect is made of three things: the THC level, the terpene combination and the dose. Reference guides describe high THC with myrcene and linalool as heavy and sleepy, and medium THC with caryophyllene and humulene as calm and even.
Three terpenes worth recognising by smell
Myrcene is the most common terpene in cannabis. It smells of earth and musk, and the same terpene is found in ripe mango and hops. It is associated with a body effect: when myrcene leads the profile, above 0.5%, reference guides describe a clear indica feel, heaviness in the body and a pull towards the sofa in the evening.
Limonene gives citrus, the same smell as lemon and grapefruit peel. It is associated with a lifted mood and a clear head, which is why limonene strains are counted as daytime ones.
Caryophyllene smells of black pepper, clove and a little wood. It is the only terpene that binds to the CB2 receptor, the same one cannabinoids work with.
How terpenes are lost
Terpenes are volatile. In a fast, warm dry they leave with the water, the light ones first, so 30 or 40% THC on a label says little if the aroma has gone. In ordinary storage oxygen takes up to half of the aroma in the first month.
When burning, limonene and pinene, the terpene that smells of pine, go first. The burning point of a joint sits around 230 °C and above. A vaporizer heats to 180-210 °C without a flame, and the light terpenes survive until the draw.
Myrcene is recognised by earth and mango, limonene by citrus peel, caryophyllene by pepper, and the nose tells them apart before any label.
