Post Harvest Microbial Activity

Post-harvest microbial activity refers to the biochemical changes produced by naturally occurring microorganisms during cannabis curing and storage. These processes—primarily driven by bacteria and fungi—can generate secondary metabolites including terpenes, esters, and other volatile compounds. The intensity and character of these aromas depends on moisture levels, temperature, airflow, and the microbiota present in the plant material. Breeders and cultivators observe that some genetics appear more susceptible to desired microbial fermentation than others, influencing final aroma profiles. Understanding microbial ecology during post-harvest handling is foundational to cannabis quality science, distinct from the plant's own terpene synthesis.

Breeders working with fermentation and cure characteristics track how specific genetics support or inhibit microbial-driven aroma development. Lineages with certain cannabinoid or moisture retention profiles may favor different microbial communities, affecting reproducibility of finished product character across generations.