Diurnal Temperature Swing

Diurnal temperature swing refers to the daily fluctuation between daytime highs and nighttime lows experienced during cannabis cultivation. This environmental parameter—not a terpene itself—significantly influences terpene expression, resin production, and cannabinoid profiles in developing plants. Cannabis cultivars grown in environments with pronounced temperature differentials (typically 10-15°C between day and night) often exhibit enhanced volatile compound development compared to stable-temperature conditions. Breeders and growers track diurnal ranges as a cultivation variable affecting secondary metabolite accumulation. The mechanism remains an active area of horticultural research, with lineage records frequently documenting phenotypic variation linked to temperature cycling protocols.

Breeders working in controlled-environment agriculture often standardize or deliberately modulate diurnal temperature swings when phenotyping new lines, as this variable can mask or enhance terpene/cannabinoid expression across generations. Understanding a strain's temperature sensitivity helps inform both seed selection criteria and grow-environment specifications.