Can the Environment influence the Gender?

ISK

ISK

Well-Known Member
Some final pic's of the plants:

M1 (the male) - voted off the island
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M2 - the best of the bunch
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M3 - this was the weakest seedling of them all but came on strong
PC070011.JPG

F1 - she got fairly tall but was not as healthy as the ones from the female friendly room
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F2 - this was the one we were waiting on to show gender
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F3 - the runt of the litter
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group pic of the females
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waterdawg

waterdawg

Well-Known Member
bradburry said:
It would be more solid if you used more seeds ...........im sure if there was a way to determine the sex of a seed it would have been found by now and we wouldn't have to go to such extreme methods like silver spray to get the seed we all so dearly seek........the female ;)




but nice try......remember me when your a millionaire lol
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So he needs more seeds right lol. Dont think this was anything more than for ops own curiosity not a definitive scientific experiment. Its kind of like a lets see what happens thing. I think thats kind of obvious lol.
 
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madkw

New Member
good day to all ,,
how can you tell if the plant is male or female !!
also how long it take from day one tell harvest ? or what the faster way to do it
is the strong stuff take longer to grow ??
 
purplehays1

purplehays1

Well-Known Member
george cervantes claims u can. He claims blue light, low temps and high humidity produces more female plants. I personally dont think this is true and find that as long as u dont stress the young plants in weed 3-6 then they are genearlly about 50% female, higher male rates are possible if you stress the plants or with certain genetics. So yes environment can effect the m:f ratio, but im,o its more to do with extremes stressing the plant.
 
purplehays1

purplehays1

Well-Known Member
ya i still try to give my plants blue light, low temps and high humidity when they r from regular seeds, but i dont seem to notice a difference :)
 
qwizoking

qwizoking

Well-Known Member
I notice a huge difference. It used to be seemingly random in my grows most of the time being mostly female. Temps were the main factor for me, I could count on 80% female just by having temps in the high 60's after germ and through sexing, while attempting to still optimize conditions. After adjusting humidity and nutrient ratios I easily got it to ~90..
 
GroErr

GroErr

Well-Known Member
Interesting experiment but not enough data for any sort of conclusion. IDK what I've been doing lately other than maintaining an 80/60 environment through seedlings and veg. In the last couple of months, I haven't been able to get a male even though I've wanted one. 80F/60RH has produced 8 fems from 8 reg seeds. 4x were DIY seeds, I know they're regs, the other 4 were reg Harlequin seeds, you never know though with commercial regs, could be called regs because of germination producing the odd male...
 
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THE KONASSURE

Well-Known Member
if you want males then run high temps with low humidity, and give more then 16 hours light and feed low N and higher pk and let them get dry before watering

Also if you use substraint from a female plant to germinate a seed it can be more likely to be male as there will be female plant hormones in the substrate so the plant will be slightly influenced to grow male
 
qwizoking

qwizoking

Well-Known Member
Only thing I disagree with is the soil. Not saying it isn't a factor as I don't have perfect rates. But overall I avg 96%. And that's over hundreds of plants since my trials began last sept...but I also only use hps and many have said light color is a factor. I lean more to saturation levels over color and length

Ive been using the same soil for years composting the female plants back in as well. That rootball is amazing and supposedly can feed microbes up to 2 years.I doubt its that long but I do know phenols etc remain a good while
 
T

THE KONASSURE

Well-Known Member
if you veg under hps

the extra heat from all that red band can make more males come up as they think it`s later in the "season" then it is and that there will be tons of females for their balls

If you were to switch to a 5000k or bluer bulb even if just for 2 week or so, you`d cut down males a lot and you`d get more nodes and bushing

even running 12/12 from seed with 2000k or 3000k you still risk more males due to the extra heat and the extra stimulation of flowering hormones due to the balance of light

if you have a dimmable hps ballast you could always turn it down and put a cool blue light of some kind in there too to balance things out ?
 
ISK

ISK

Well-Known Member
qwizoking said:
Anyway sorry... Back to the thread...
What are your results so far good sir?
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well as I mentioned, I find it interesting that the plants in the male friendly environment all became females, and those in the females friendly room only produced 2 of 3 females.

IMHO, I know my sample size was very small and no clear conclusions can be made, but I believe all seeds have a pre-determined gender but can be influenced by the environment

It appears the seeds depicting female characteristics still turned out female even when breaking every known rule, but yet the seeds depicting male characteristics can be influenced

at the end of it all, I can say for sure is that the female friendly room produced bigger healthier plants
 
Grojak

Grojak

Well-Known Member
germinating tems mater… colder temps have proven to make more females (this accepted among several breeders and tested) germinating on a heating pad will have a higher male ratio in most cases, but will also germinate faster and perhaps at a better rate but that last part I don't have any info on.
 
ISK

ISK

Well-Known Member
Grojak said:
germinating tems mater… colder temps have proven to make more females (this accepted among several breeders and tested) germinating on a heating pad will have a higher male ratio in most cases, but will also germinate faster and perhaps at a better rate but that last part I don't have any info on.
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in this experiment, all seeds were germinated exactly the same...so in this case germination temps were not a factor.
 
ISK

ISK

Well-Known Member
THE KONASSURE said:
if you want males then run high temps with low humidity, and give more then 16 hours light and feed low N and higher pk and let them get dry before watering
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agree with the high temp and low RH but the most would say more hours of light as I did with 20/4 in the male room
 
T

THE KONASSURE

Well-Known Member
yeah once you go over 14 hours light you start to get a chance of more males over 18 and even if you do everything else correct in regards to aiming for females you`ll still risk more males, idk I`ve always tried for females getting males seemed to be easy when you don`t want them

Had some cheap seeds once and they were coming up over 90% male
 
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