Instability of gender is a desirable trait in the wild, where reproduction is the most urgent goal. In cultivation, gender predictability is far more helpful, because female plants that have not been pollinated are the most productive. It is possible to use a combination of cloning and “shocking” plants to get them to produce feminised seeds that reliably produce female offspring. A clone will retain the same sex throughout its life, so the clone of a female plant is also female. In short feminised cannabis seeds are highly convenient.