For a plant to show sex it doesn't have to be on a 12/12 light cycle. Most plants will show sex around 1 - 1 1/2 months old. That is when they are sexualy mature.
I don't see any signs of sex yet but its definitely a sativa dominant plant and with all the sativa dominant plants I have grown they tend to show sex later then a indica dominant plant.
Once their past the seedling stage about a month to month and half you should start seeing signs of plant sex with sativa`s being towards the latter part.
Some plants however will not show sex at all until they begin flower.............either manually switching the lights if indoor or waiting till the summer solstice and the shortening of daylight hours if outdoor.
Anyone tell me what they think on my x2 remaining plants? It maybe too early too tell, currently into day 34 of my grow. Worried about plant 1 being a boy, but am pretty sure plant 2 is female. See what you think:
Pic one looks like it might be a male but still kinda early and pics 2,3 don't see any signs of sex yet.
In pic one it looks like it could be a little ball sack but its not that close up of a pic or it could also just be new veg growth so keep an eye on the spot. I usually start looking around the second node from the top.
Ok cool, am keeping fingers crossed my two remaining plants are females. They are meant to be female seeds aswell.