Under 24h light, not all strains will give you preflowers that early. It's very strain dependent.
Are your nodes alternating yet? When they start, that's about the time you will have a much better chance of sexing under veg conditions.
stinkyattic Reviewed by stinkyattic on . showing sex ? iv'e read and been told that it takes around 3 to 4 weeks from seed to show sex in veg stage. well mine are almost 5 weeks in and still no sign of sex. no ball clusters no white hairs nothin. now the new leaf sets coming out have a white fuzz on them close to where there coming out at. but no white hairs so what gives can they take longer than 5 weeks? and if so is there a point where it's to far in and they have to show? Rating: 5