Trouble identifying M/F strains

[king kong]

Yeah I'm having a big issue identifying male or female while still in growing stage. I've planted more the 100 plants so I don't want them to become male . So kindly advice how to detect male trees. 

[Bos]

Some plants show big and clearly and others not so much. Signs may be very small....a magnifying glass will be handy.

Plants usually start showing sex from 4-6 weeks from germ.

[Naughty.Psychonaut]

@king kong 

If I am understanding you, you wana be able to tell before they go into flower. Only way to do that is lab testing.  

otherwise you gotta wait till the plant expresses it physically so you can just tell like in the photos Bos showed, will be easy to tell them apart. 

trick is to get them before the male flowers open and pollenate your females. there is about a 1 to 2 week window, depending on genetics and conditions from when a male flower is clearly visible till it opens and releases pollen. so you gotta make sure you get them in the first few days of forming. 

[Naughty.Psychonaut]

5 hours ago, RichardCPT said:

First, take notice if your plant has any developing pips or seeds in the area where it is about to bloom. If so, it is most likely a male strain. 

Hi @RichardCPT hope you are well, 

just wana help you here, the males don't make seeds they only make pollen. They don't really have the potential of making seeds, only the females do once they have been pollenated by the pollen from the males. the male pollen sack looks like a ball before they open, but there's no seed. 

5 hours ago, RichardCPT said:

If you happen to come across any male or hermaphrodite plants, it's best to uproot them and dispose of them properly, as they can potentially damage your other female plants if left mixed in with them

the only reason a female plant would make seeds is if it was pollenated by a male or turned hermie through bad genetics or stress and pollenated itself. 

the only reason to remove males or hermies is to avoid seeds, this is how we get seedless weed indoors. outdoors it's harder cause of stray pollen being able to travel in the wind.