Circadian Rhythm Markers

Circadian Rhythm Markers refer to volatile organic compounds (VOCs) and terpene profiles that fluctuate on diurnal cycles in cannabis flowers and foliage. Breeders and researchers have observed that certain terpene ratios and aromatic signatures shift throughout the day and across the flowering window, influenced by light cycles, temperature, and plant maturity. These patterns are not unique to cannabis but are documented across aromatic plants as secondary metabolite production responds to circadian cues. Understanding these markers helps breeders select for stability in aroma profiles and predict harvest timing based on volatile expression. This trait is commonly associated with photoperiod-dependent genetics and is relevant to controlled environment cultivation research.

Breeders working in controlled-environment and phenotype-hunting programs track diurnal VOC shifts to identify stable phenotypes and optimize harvest windows. Genetic lines showing consistent circadian aroma patterns are often valued for predictable terpene expression across growing conditions.