Post Harvest Metabolism

Post-harvest metabolism refers to the biochemical processes that continue in cannabis plant material after harvest, including enzyme activity, cannabinoid decarboxylation, terpene volatilization, and chlorophyll breakdown. These metabolic changes alter cannabinoid profiles, aroma compounds, and plant material color over time, influenced by temperature, humidity, light exposure, and storage conditions. Understanding post-harvest metabolism is critical for breeders developing cultivars with stable cannabinoid ratios and consistent chemical profiles across grow cycles and storage periods. Different strain lineages exhibit varying rates of degradation, making this trait relevant for seed selection and cultivation planning. Proper curing and storage protocols can slow unwanted metabolic shifts, while some breeders intentionally leverage these processes to develop desired chemical end-states.

Breeders monitor post-harvest metabolism when selecting parent plants for cultivars intended to maintain specific THCA-to-THC ratios or terpene stability. Lineages with slower metabolic degradation rates are often preferred for breeding programs targeting consistent product quality across multiple harvests and storage environments.