Temperature Chemotypes

Temperature chemotypes refer to cannabis plants whose secondary metabolite profiles—particularly terpene and flavonoid expression—shift measurably in response to growing environment temperatures. Cooler night cycles are often associated with increased anthocyanin production and certain monoterpene volatility, while warmer conditions may favor different terpene ratios and cannabinoid distributions. This phenomenon is documented across breeding programs studying phenotypic variation within single genotypes. Understanding temperature chemotypes is valuable for controlled environment cultivation research and for breeders mapping environmental sensitivity in their lines. The trait demonstrates that identical genetics can express distinct chemical profiles based on cultivation parameters, complicating strain standardization efforts.

Breeders working in controlled environments use temperature chemotype mapping to identify genotypes with stable cannabinoid and terpene expression across climate ranges, or conversely, to select for intentional temperature-driven variation. This data informs breeding programs developing cultivars suited to specific growing climates or seasons.