Nanners (bananas) are bare, yellow or pale-green anthers that grow directly out of a female flower cluster, usually late in flower. They shed pollen, often without an obvious pollen sac, and can seed the plant and anything nearby. They are a form of intersex (hermaphrodite) flowering.
In practice
A grower in week 7 of flower spots small yellow curved structures poking out of the buds. That is a nanner. Remove the plant from the room if possible, or at minimum pluck visible anthers carefully, bag the plant at harvest, and record the event against the cultivar. If several plants of one line do it, the line is the problem, not the room.
Don't confuse with
- Pistils/stigmas: the white to orange "hairs" of a normal female flower.
- Pollen sacs (balls): closed male flowers at nodes. Nanners are naked anthers.
- Foxtailing: new calyx growth stacking on old buds, often from heat or light stress.
Myth check
"A few bananas at the end are normal; it means the plant is finishing." GenetixBay house position (Myth): nanners are not normal. Drug-type cannabis has been dioecious and stable for thousands of years. Late bananas mean poor genetics, usually from repeated selfing, careless feminising or untested crosses; stress only reveals the weakness. Even the best gas you ever grew is a herm if it throws them. Cull it and don't breed from it. Research on intersex flowering (Punja & Holmes 2020) documents the trait; GenetixBay reads it as a breeding fault. See hermaphrodites and Mythbusters.
