Hermaphrodite

Hermaphroditism (commonly called "hermie" in cannabis vernacular) is one of the most damaging plant problems in indoor cultivation because a single hermaphrodite can ruin an entire seedless flower crop within 7-14 days. Cannabis is naturally dioecious (separate male and female plants), but female plants carry latent intersex genetics that can express under sufficient stress as a survival mechanism — if no males are present to fertilize the female, hermaphroditism allows self-pollination to ensure the next generation. Two distinct hermaphrodite forms: (1) True hermaphrodites — plants developing both pistils and pollen sacs from genetic predisposition, often inherited from poorly stabilized seed lines; the entire plant produces both flower types throughout flowering. (2) Stress-induced hermaphrodites (more common) — plants developing isolated banana-shaped pollen anthers ("nanners") between bud calyxes during late flower in response to stress events. Stress triggers: light leaks during the dark period (any light above 2 lux), heat spikes above 85°F, severe nutrient deficiency or excess, root damage, late harvest (plants past optimal maturity will trigger emergency self-pollination), physical damage to flowering branches, and inadequate genetics from poorly-feminized seed lines. Identification: 10x loupe inspection of buds during weeks 5-9 of flower; nanners appear as yellow-green crescent or banana shapes emerging from inside calyxes. Action: small isolated hermaphrodite traits can be plucked manually with tweezers; severe hermaphroditism requires removing the affected plant entirely to protect adjacent flowers. Prevention: source seeds from reputable breeders with strong feminization protocols, eliminate light leaks rigorously, maintain stable temperature and humidity throughout flowering, and harvest at optimal trichome maturity rather than letting plants over-ripen.