Post Harvest Chemistry

Post-harvest chemistry describes the biochemical transformations that occur in cannabis plant material after harvest, including decarboxylation, oxidation, and terpene volatilization. These processes alter cannabinoid profiles, aroma compounds, and overall chemical composition during drying, curing, and storage. Breeders and cultivators track post-harvest chemistry because final cannabinoid ratios, flavor development, and stability depend partly on initial plant chemistry and partly on handling conditions. Understanding these shifts helps predict how a cultivar's profile will change from fresh flower to finished product. Preservation methods—freezing, controlled atmosphere storage, or vacuum sealing—directly influence the rate and extent of post-harvest chemical change.

Breeders select for cultivars with stable cannabinoid backbones and robust terpene profiles that weather post-harvest processes predictably. Some lineages are documented to retain volatile aromatics better during drying or to develop more favorable cannabinoid ratios over the curing window.