Learn about marijuana life stages and gender. When does the plant start flowering? How can you tell if your plant is a boy or a girl? What. Male vs Female marijuana plants Typically a marijuana plant can be female or male, but occasionally you will find a hermaphrodite in the mix. Males – not as useless as we think! The uses for the male plant never I have been told by many Marijuana "experts" that you can't get high on male marijuana.