Gland Stalk Ratio

Gland stalk ratio refers to the proportion of trichome head size relative to the length of its supporting stalk, a morphological trait observable under magnification. Cannabis plants with shorter stalks relative to large resin heads are said to have a "low" gland-stalk ratio, while elongated stalks supporting smaller heads show a "high" ratio. This characteristic is determined by genetics and environmental factors, and breeders track it because it influences resin visibility, stability during handling, and the mechanical integrity of trichomes. Lineage records frequently report that certain landrace and stable lines exhibit consistent gland-stalk profiles, making it a useful descriptor for documenting cultivar architecture.

Breeders working in hash and concentrate production often select for lower gland-stalk ratios—compact heads on short stalks—because these trichomes are more resilient to agitation and sieving. Conversely, breeders developing flower lines may favor varied ratios depending on desired aesthetic and handling characteristics.