Tannin Structure

Tannin structure refers to the concentration and composition of polyphenolic compounds in cannabis plant tissue, particularly in flowers and leaves. These compounds are secondary metabolites that develop during plant maturation and contribute to astringency and color expression. Tannin profiles vary significantly across genetic backgrounds, with some lineages accumulating higher levels than others. The tannin structure of a cultivar is influenced by both genetics and environmental factors such as light exposure, nutrient availability, and harvest timing. Breeders studying tannin expression often examine dried material under magnification to assess cellular density and pigmentation patterns. Understanding tannin variation is relevant to breeding programs focused on plant structure, preservation, and processing outcomes.

Breeders working with tannin-rich genetics select for structural integrity and extended shelf stability, as higher tannin content is associated with slower oxidation in properly stored material. Tannin expression also serves as a visible marker for genetic classification, helping breeders track lineage stability and phenotypic consistency across generations.