Hi , does anyone know if you can tell the sex early by the leaves?
I have four plants presumably the same strain, and 2 have very narrow leaves, and the other two are much broader, is this a way of telling before they flower?

That is the slight difference in the plant genetics, not a sex indicator.

You have to wait for preflowers to be able to sex them. Usually at about six weeks I think. White pistols/hairs = fem, little balls = male.

Good luck.

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Never induce flowering until after the primordial flowers appear during vegetation. Numbers like 4-6 weeks doesn't really help, they're based on peak performance by healthy plants and novice growers can't rely on these timetables. Genetically, a plant can be much younger even if it's 4-6 weeks old, and not show pre-flowers. If you're new ish, just wait until you can see pollen sacs or calyxes. Check twice a day. You'll start to notice and recognize the primordial flowers and be keen on it later. Be patient. Fully formed pollen sacs won't open for 24 hours. But also be cautious, a plant that's not thoroughly checked may have an early opener and pollinate all you're beautiful sinsemilla!

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Operation: Marijuana for the Masses. Here's your assignment Soldier of Fortune; you will germinate any and all schwag seeds which are viable for plantation. You will then randomly plant all germinated seeds before development into seedling throughout your home town in public places which hold a viable environment for growing. You will leave and never look back. Briefing over.

Thanks very much for your reply, my plants are nearly 2metres tall now, growing outside, and no sign of any flowers yet!

Thanks again

well, i aggree you wont be able to tell from the leaves what sex it is.. but as a rule of thumb, it seems to be universal for each strain that the males tend to be taller and more lanky in growth then the females. pay attention to plant shape more then leaves.

good luck.

closet cult is right. Males grow noticeably faster and with greater internode space. You won't be able to tell the sex from the leaves. The fact that one is much broader than the other is a sign of heterozygosity. That is, though it may be the same strain it could easily have a dominant chromosome for broad leaves and some of the seeds did not get that chromosome and show narrow leaves from a homozygous recessive chromosome pair. This is pretty commonly seen in hybrids, since 100% indica or sativa, etc., tend to be homozygous and show constant characteristics from plant to plant. The more you mix the genetics the more random your phenotypical plant is gonna be. That's just off the top of my head, I think Jorge Cervantes does a better rundown, I just wish I had my copy on me.

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Operation: Marijuana for the Masses. Here's your assignment Soldier of Fortune; you will germinate any and all schwag seeds which are viable for plantation. You will then randomly plant all germinated seeds before development into seedling throughout your home town in public places which hold a viable environment for growing. You will leave and never look back. Briefing over.

Thanks again, you have been very helpful, will have to wait and see, but now I have more idea of what to look for!!!

What a misleading title! I haven't been this duped since I went to Stoner's Pot Palace and all they sold was pots!

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"I smoke two joints before I smoke two joints then I smoke two more!"

ha ha ha, was trying to get some growing tips there, thought I would get somebody`s attention!!! Are you an outdoor grower? This is my first time and I want to get it right.
Good growing to you