sexing

my plants are about a month old and i need to know if that is too early to sex the plant even though they are 81/2 inches

it isn't size that matters, it's flowers dude. are they making any of any sort?

I would recommend waiting until their branches grow in more and then simply place a brown lunch bag over it and create a 12/12 light cycle for two weeks or until sex.

Or just look for the pre flowers, I was going to do the brown bag method...but pre flowers showed up on 3 out of 4 of my plants.

But the brown bag method wont work if you are using a strong light...are you indoor/outdoor?