Terpene Library

Geraniol is rose. It's the molecule behind rose oil and geranium, it's what citronella candles are built on, and it's the sweet note in some pipe tobaccos. In cannabis it's rare and immediately recognisable: a jar that smells faintly of a flower shop.

Nerolidol is bark and blossom at the same time. It's in neroli — orange blossom — as well as jasmine, ginger and lemongrass, and it smells like fresh-cut wood with something floral behind it. In cannabis it usually works as a background note, giving depth rather than character.

Terpineol is lilac and lime blossom — sweet, floral, faintly soapy in the way good soap is soapy. It's also in pine and eucalyptus, which is strange company for a flower note, and it's part of why some pine-forward strains have an unexpected sweetness underneath.

You've met limonene every time you've torn the peel off an orange. That bright oil that sprays into the air is mostly this, and it's the second most common terpene in nature — lemon, lime, grapefruit, juniper all carry it. In cannabis it's the one that makes a jar smell scrubbed clean rather than earthy.

Terpinolene is the hard one to pin down, because it doesn't smell like a single thing. There's apple in it, and lilac, and something sharper underneath closer to nutmeg or cumin. It's the terpene that makes a strain smell complicated rather than simply fruity or piney.

Valencene is named after the Valencia orange, and that is exactly what it smells like — sweet orange, not the sharp lemon of limonene. Tangerines and grapefruit carry it too. In a jar it's the difference between citrus that smells like fruit and citrus that smells like cleaning product.