Senescence Chemistry

Senescence chemistry refers to the biochemical processes that occur in cannabis plants during their natural aging and end-of-life cycle, particularly during late flowering and post-harvest maturation. As plant cells break down chlorophyll and mobilize nutrients, secondary metabolites—including cannabinoids and terpenes—undergo transformation and concentration shifts. Breeders and cultivators study these chemical changes to understand how harvest timing affects final cannabinoid profiles and aromatic complexity. The term encompasses enzymatic degradation, oxidative processes, and terpene volatilization that occur naturally as flowers mature and dry. This knowledge informs breeding decisions around strain stability, shelf-life characteristics, and how genetic backgrounds respond to post-harvest curing protocols.

Breeders working with senescence chemistry focus on selecting genetic lines that exhibit stable secondary metabolite retention through late-stage maturation and curing. Understanding how terpene profiles shift during senescence helps guide variety selection for desired aromatic and chemical outcomes after drying and storage.