How to recognize the difference between a male plant and a female plant?

A male plant is often long and thin and has fewer leaves. The moment the plant starts to flower, a male plant has seed male flowers or seed ‘balls’. A female plant will never have these but she has flowers and resin. A male plant can fertilise a female plant so a female plant will produce seeds. The result of the production of seeds by the female plant is that energy is lost and this results in a smaller harvest. We only sell female seeds.