Monoterpene Sesquiterpene Ratios

Monoterpene-to-sesquiterpene ratios describe the relative abundance of smaller volatile molecules (monoterpenes like limonene and myrcene) versus larger terpene compounds (sesquiterpenes like caryophyllene and humulene) in cannabis flower or extract. This ratio varies widely across cultivars and can shift during growth, drying, and storage due to differential volatility and oxidation rates. Breeders and researchers use ratio data to predict aromatic profiles and terpene stability, as monoterpene-dominant chemotypes often present brighter, more volatile aromas, while sesquiterpene-rich profiles tend toward earthier, more persistent scents. Accurate ratio measurement requires gas chromatography or similar analytical techniques and is commonly reported in breeding literature and lab test results.

Breeders selecting for specific terpene profiles track monoterpene-to-sesquiterpene ratios to stabilize desired aroma characteristics and predict how cultivars will age. Ratios also inform decisions about harvest timing and post-harvest handling, since monoterpenes volatilize faster than sesquiterpenes.