What age does a plant pre flower?

wondering how old a plant usually is when it starts showing signs of what sex it is?
I am able to sex some of my plants, but not all of them. :leaf: :leaf: :leaf:
 

yesum

Well-Known Member
4 weeks from sprout but 6 weeks is better. I have a 30x loupe for it, $4 off ebay.
 

MidnightJoker

Well-Known Member
It usually takes two weeks of seedling growth and then 4 weeks of vegetative growth, so a total of 6 weeks from seed.
 

smallclosetgrowr

Well-Known Member
thats like asking how long does it take for a boy to hit puberty.they show preflowers when they mature , all are not the same.roughly i would say 4-8 weeks veg tho.
 
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