Temperature Phenotypic Expression

Temperature phenotypic expression refers to how cannabis plants display varying aromatic profiles depending on growing conditions, particularly thermal fluctuations during development. The same genotype can produce noticeably different terpene ratios and volatile compound concentrations when cultivated in cool versus warm environments. Cooler night temperatures during flowering are often associated with preservation or amplification of certain monoterpenes, while consistent heat may favor sesquiterpene development. This environmental plasticity means that identical genetics grown in different climates or controlled environments can express distinct aroma signatures. Understanding this variability is essential for breeders seeking stable, reproducible aromatic traits across diverse growing conditions.

Breeders studying temperature phenotypic expression work to identify genotypes that maintain consistent aromatic profiles across temperature ranges, supporting crop standardization. This trait assessment helps distinguish true genetic stability from environmentally induced aromatic variation when evaluating parent lines.