At which point does a seed become a male or female?

At which point does a seed become a male or female? Is it genetically determined within each seed? Or do environmental conditions determine sex during the vegetative stage?

the day it is made. but we can't tell untill you grow it. after it flowers about 2 to 3 weeks you can tell male and female apart.

I have read on various forums that if a plant is exposed to rough environmental conditions (too low ph etc.) it is more likely to become a male. Is that misinformation?

More acidic soil = more likely to become a male

There are quite a few myths out there concerning male and female seeds. It all comes down to genitics and I believe its either a male or female seed.

Yeh I read it was environmental conditions.It was on hightimes.You have a better chance of getting females if:14-16 hours off light,small dose of nitrogen when there less than 1 month old,(liquidfert.)Day temps were 70,Cooler nights...

I'm interested in what they have to say about the biology of that then? There must be some scientific data on this.

But if it's environment then how can you explain feminized seeds then? They are made by a female plant that is pollinated by another female plant(female stressed into a hermi). Making female seeds. The reason they know the seeds will become female is because there is no male gene present at the time of making the seeds. Now feminized seeds can be female or hermi. Never male. So this whole environment BS is crap I think. Sex would have to be determined at the time of making the seeds.

dagon420 said:

At which point does a seed become a male or female? Is it genetically determined within each seed? Or do environmental conditions determine sex during the vegetative stage?

Click to expand...

Here's a list of anecdotal things to do to influence sex. Most involve the first 3 weeks of vegging as the time period to alter it.

http://www.snow-white.nl/engeland/h40PERCENTAGEOFFEMALES.htm

I'm sure I have never read (besides a newb post) that enviornmental conditions affect it becoming a male or not. These conditions could stress the plant and cause it to herm but it sounds ridiculous to say "sex is pre-determined but stress can cause herm or males..." That's like saying if a mother puts stress on her child in the womb the daughter can turn into a male or herm.... This is really bothering me and I will try and find soem real answers. Because if sex is determined by conditions and not when the seed is formed then fem. seeds are 110% pure bull doodie everyone is eating up. I think that really no one knows for sure

Yea thats interesting that you say that stress can make a female into a herm but it can't be stressed into a male because thats genetically determined. Do they really stress female plants to make them herms or do they just use the herms that come out by chance?

keep a higher humidity, around 70% -80% and you will get more females..
keep the temps about 70-75. the cooler temps give more females than males.. males like heat.
less stress, less stress = more females..
18-6 lighting schedule rather than 24-0 give more females..
females like a good nitrogen diet..
males like more k or p, cant remember which atm..
control those things and your chances of getting a female will be greatly increased!

Have you seen this effect yourself? What proof do you have for this?

I just don't buy it. I think sex is determined in the seeds at developement. I do think males or females prefer certain conditions and enviroment.