Seeds - Female or Male - Can You Tell The Difference?

[Stoned Redneck]

Well I sent the "Chart" to herbies and he said BS.I kind of expeted that though..They said they go through so many seeds that they don't have tome to study each one...They also said that some of the uglyest seeds have grown the prettest plants.. I am going to get some Regular Bomb Seeds and will be studying them closely...Just in case.haha.I so hope it helps...Happy Hemping ,Red

 

[OZ BRIT]

Well I sent the "Chart" to herbies and he said BS.I kind of expeted that though..They said they go through so many seeds that they don't have tome to study each one...They also said that some of the uglyest seeds have grown the prettest plants.. I am going to get some Regular Bomb Seeds and will be studying them closely...Just in case.haha.I so hope it helps...Happy Hemping ,Red

Good green grass growing my friend

 

[crappiebait]

I disagree, I think it is 100% valid. I have seen this in a documentary about the legalization wave about to come.
If this old memory serves me right, they also talked with one of the top breeders across the pond, who has gone
as far as spending hundreds of thousands of dollars & built a machine that sexs the seeds and packages them
all in the one shot.

 

[Stoned Redneck]

I disagree, I think it is 100% valid. I have seen this in a documentary about the legalization wave about to come.
If this old memory serves me right, they also talked with one of the top breeders across the pond, who has gone
as far as spending hundreds of thousands of dollars & built a machine that sexs the seeds and packages them
all in the one shot.

Cool !!

 

[Lester Freeman]

Also remember that seeds have "phenotypes" as well, and these traits are expressed through genetics and is a probability function. So, I say that this "chart" cannot be 100% accurate (which is obvious because 100% yields, guarantees,and/or efficiencies don't occur in nature). We may have very good conversion rates, synthetic yields but never 100%. Nature works in mysterious ways, it is my opinion that I can't blanket statement and look at the seed and tell what sex it is, I think it is much more complicated than that, but I will run a little experiment next time I plant a large batch. We should definitely post our results here in the future.

PS I realize it seems like I'm saying " I'm 100% guaranteed that 100% guarantees don't exist", which is contradictory in itself, but that would be diving into a deep philosophical debate...

 

[pucker huddle]

I was taught a long time ago that temp. plays a role in sex. I will have to keep an open mind and see how this develops.

 

[David Bowman]

FWIW, during my first grow I was fortunate enough to have 4 females out of 5 plants. I then asked "Is sex determined environmentally or genetically, both? I've always wondered how that works with cannabis plants."

Post #45 contained GL4A's response:

This is actually an interesting topic.

Genetically - MJ is pre-programmed to come out 60% female.

The actual sex is not determined until the fourth or fifth week of veg. Depending on environment - I believe you can go as high as 90% males. There was a study done by Dutch Seeds - it is still available on the web - which included this result:

Of the 5 above-mentioned environmental factors the first three are the most practical:

Level of nitrogen and potassium of the seedbed: A heightening of the standard level of nitrogen makes for more female cannabis plants originating from the weed seeds. A lowering of the nitrogen level shows more male cannabis plants. A heightening of the level of potassium tends to show more male marijuana plants, while a lowering of the potassium level shows more female marijuana plants. A combination of a higher nitrogen level for the period of a week or two and a lowering of the potassium level is recommended.

Humidity and moistness of the seedbed: a higher humidity makes for an increase in the number of female cannabis plants from weed seed, a lowering for an increase in male cannabis plants. The same is valid for the moistness of the seedbed.

Level of temperatures: lower temperatures make for a larger number of female marijuana plants, higher temperatures for more male marijuana plants.

Colour of light: more blue light makes for female cannabis plants from seed, more red light makes for more male cannabis plants.

Hours of daylight: few hours of daylight (e.g. 14 hours) makes for more female individuals, a long day (e.g. 18 hours) makes for more male cannabis plants.
​

Post #46 was my reply with the specifics for my grow as they related to the above environmental factors. My second grow is at higher temperatures and RH and it will be interesting to see if that has any affect on the male/female ratio.

 

[Lester Freeman]

Nature versus nurture, it's a debate people have been arguing over for hundreds of years.

 

[Lester Freeman]

To run this experiment (based off the chart), I think you would have to do it many many many times; Like hundreds of test plants and seeds for it to be somewhat reliable results. Now that I looked back at the chart, I definitely disagree that I should "discard" my seeds that don't look "female". The environment plays a very large role in my naturally flowering plants, photoperiod for instance, in ideal consistent photoperiod outdoors, I see 50% of my seeds female, and 50% male on a near regular consistent basis, and I think that the environment ( lighting schedule, RH, temp, % composition of the air) plays a large role in that ratio, just my opinions..

 

[Richard Richardson]

I followed the chart and planted 1 seed from 10 regular Magic Bud (Paradise Seeds). Turned out to be a hermie

 

[Lester Freeman]

I followed the chart and planted 1 seed from 10 regular Magic Bud (Paradise Seeds). Turned out to be a hermie

Hard to suppress millions of years of plant evolution

 

[Richard Richardson]

Maybe I looked at it too much in indecision

 

[Grow jr]

Good information I will observe this trait also for verification. I am just starting out but I did grow once long ago, I was told Hi nitro in veg stage leads to females. I had 4 plants all female so I thought it to be true. I have not found that info here yet, maybe it is not true.

 

[ZachZ]

Ive actually tested this with 16 predicted female and 4 predicted male. I ended up with 16 female and 4 male..

 

[Icemud]

I recently came across this image when I was doing some photo browsing and I wondered what everyone's input might be on this theory?

Thank you in advance for your input.

Its a myth. not true.

 

[Melville Hobbes]

That chart is bunk.
It's been around for at least a decade, if it worked everyone would use it.

 

[Braddah Waiheesohai]

The male seeds actually have tiny nuts if you look close enough.

 

[grayeyes]

Well, kids, this comes up from time to time and has been proven to be bunk. You can't pick out male and female seeds.

I did think that "dutch seeds" (whoever that may be) blurb above was interesting. But then anyone can make up anything.