Diurnal Terpene Rhythms

Diurnal terpene rhythms refer to the time-of-day fluctuations in volatile terpene expression within cannabis flowers, whereby certain aromatic compounds accumulate and diminish according to circadian patterns. Research and cultivation observation suggest that terpene concentrations—including limonene, myrcene, and pinene—may peak during specific hours, influenced by light exposure, temperature cycling, and plant biology. This phenomenon is particularly relevant to harvest timing, as breeders and growers have noted that cannabinoid and terpene profiles can vary measurably between morning and evening collection. Understanding these rhythms informs breeding strategies focused on terpene stability and consistency, as well as cultivation protocols aimed at optimizing aromatic expression at point of harvest.

Breeders working with diurnal terpene patterns seek to stabilize volatile expression and select for genetic lines that maintain consistent terpene profiles across day–night cycles. This selective work supports development of cultivars with predictable aromatic character, valuable for product standardization and sensory consistency in commercial environments.