how long?

Depends on how long you vegged them. But, they should show their sex within two weeks, at most. If you vegged them for 3 weeks or more, you should see someting in the first week or so.
 
They should be showing sex already, unless they are some type of strain that show later than most. I've only grew 8 different types, and every one of them showed preflowers in veg, within 4 weeks. Have a decent camera? Take some nice clear pics of the upper internodes, and I bet we can sex them for ya right now.
 

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Well, sorry to say this, but pics 3 and 6 show the plant as definitely male, with 100% certainty. I didn't see anything to indicate any female in it, so i really doubt it's a hermie.(it was hard to tell in those first pics) Sucks man, but it's a boy.
 
jawbrodt said:
Well, sorry to say this, but pics 3 and 6 show the plant as definitely male, with 100% certainty. I didn't see anything to indicate any female in it, so i really doubt it's a hermie.(it was hard to tell in those first pics) Sucks man, but it's a boy.
Click to expand...

^^

what where u lights on befor 12/12... and how long for. i did 20/4 for about 2 months then right to 12/12. my males sex'd fast within day 2-10 ... my female sex'd in day 7-10 ... 10 days in all plants where sex'd some plants took longer to sex i guess b/c of lack of light.
 
campfire said:
^^

what where u lights on befor 12/12... and how long for. i did 20/4 for about 2 months then right to 12/12. my males sex'd fast within day 2-10 ... my female sex'd in day 7-10 ... 10 days in all plants where sex'd some plants took longer to sex i guess b/c of lack of light.
Click to expand...


Almost all strains show tiny preflowers by 6 weeks, so you probably could've sexed your alot earlier too, while they were still vegging. My last grow was the second time i started from seed, and I had all those sexed by the 4th week of vegging. If you get the hang of what to look for, you can pic out the males really early. I use a magnifyng glass usually.
 
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