Post Harvest Conversion

Post-harvest conversion refers to the chemical transformations that occur in cannabis plant material after cutting and during curing, drying, and storage. During this period, cannabinoids (particularly THCA to THA), terpenes, and other volatile compounds undergo oxidation, decarboxylation, and isomerization. Breeders and cultivators monitor these changes because they directly influence the final aromatic profile and cannabinoid composition available for analysis. The speed and character of post-harvest conversion depends on environmental conditions (temperature, humidity, light exposure), handling methods, and the plant's initial biochemical makeup. Understanding this process is essential for breeding programs seeking to stabilize or enhance specific aromatic and cannabinoid outcomes.

Breeders select for cultivars with stable post-harvest terpene retention and predictable cannabinoid conversion rates, as these traits affect consistency across harvests and storage conditions. Genotypes that resist terpene volatilization or unwanted oxidation during processing are valued in breeding programs focused on aroma preservation and shelf stability.