Environmental Influence On Secondary Metabolites

Environmental factors—light spectrum, temperature, humidity, soil composition, and nutrient availability—significantly influence the production and concentration of secondary metabolites in cannabis plants, including terpenes, flavonoids, and cannabinoids. Breeders and cultivators have long observed that genetically identical plants can express different chemical profiles depending on growing conditions. Research in cannabis cultivation suggests that UV exposure, diurnal temperature variation, and water stress can modulate terpene expression and other compound synthesis. This relationship between genotype and environment (phenotype) is central to understanding why strain expression varies across different growing systems and regions. Documentation of these environmental responses helps breeders select for stable or responsive genetics depending on production goals.

Breeders use environmental-response knowledge to stabilize desirable phenotypes, develop region-specific cultivars, and create lines that express consistent secondary metabolite profiles under controlled conditions. Understanding how genetics interact with cultivation variables also informs selection for resilience and consistency in commercial production environments.