Plant Sex Expression

Plant sex expression refers to the phenotypic manifestation of sexual characteristics in cannabis, including the development of pistillate (female), staminate (male), or hermaphroditic reproductive organs. Cannabis is typically dioecious, meaning individual plants express either male or female flowers, though environmental stress, genetics, and cultivation practices can trigger hermaphroditism. Understanding sex expression is foundational to breeding, as only female plants produce the resinous flowers sought in most commercial and research contexts. Male plants and their pollen are essential for controlled breeding programs and genetic research. Hermaphroditic expression can result from genetic predisposition or environmental factors such as light stress, nutrient imbalance, or temperature fluctuations. Documentation of sex expression stability across generations helps breeders develop m

Breeders select for stable female expression and screen for hermaphroditic tendencies to maintain pure breeding lines. Male plants are deliberately cultivated for pollen production in hybridization programs and backcrossing work to achieve desired trait combinations.