Post Harvest Biochemistry

Post-harvest biochemistry refers to the chemical transformations that occur in cannabis plant material after cutting and during curing, drying, and storage. These processes involve enzymatic activity, oxidation, decarboxylation, and microbial fermentation that alter the plant's aromatic and cannabinoid profiles. Chlorophyll breakdown, terpene oxidation, and the conversion of THCA to THC are key biochemical events during this phase. Understanding post-harvest chemistry is essential for breeders and cultivators seeking to stabilize desired aroma profiles and cannabinoid ratios. Different drying speeds, humidity levels, and cure conditions trigger different biochemical pathways, making post-harvest handling a critical variable in final product chemistry.

Breeders select for genetic traits that support favorable post-harvest transformations—such as terpene stability, optimal moisture retention during cure, and enzymatic profiles that enhance aromatic complexity during aging. Lineage records often document how specific cultivars respond to standard cure protocols, informing breeding decisions for consistency.