Temperature Sensitive Expression

Temperature Sensitive Expression refers to cannabis traits whose phenotypic presentation varies measurably across different growing temperatures. Certain cannabinoid ratios, pigmentation patterns, terpene profiles, and morphological features may shift when plants experience cooler or warmer conditions during flowering and maturation. This phenomenon is well-documented in breeding records, with some cultivars showing purple or red anthocyanin expression primarily under cooler night temperatures, while others display altered terpene compositions or resin production at different thermal ranges. Understanding temperature sensitivity is critical for standardized seed production and phenotype stability, as the same genetic line may present differently across climates or seasons. Breeders working with temperature-sensitive genetics must carefully document growing conditions to reliably reproduc

Breeders select for or against temperature sensitivity depending on target markets and growing conditions. Stable, temperature-insensitive phenotypes are often prioritized for commercial consistency, while some craft breeders deliberately exploit temperature sensitivity to produce region-specific expressions.