-
As of today ICMag has his own Discord server. In this Discord server you can chat, talk with eachother, listen to music, share stories and pictures...and much more. Join now and let's grow together! Join ICMag Discord here! More details in this thread here: here.
all males
- Thread starter bogglegum
- Start date
if your getting all males, then you really are doing something wrong. but one can't really know whats wrong unless you tell and show what you've done up to now. uesing bag seed could be giveing you hermies all the time but to get real males from 100% of the seeds is a real achievement. the plants have a natural urge to reproduce so you normaly should get about 50/50 male female ratios. i don't know how its possible to get all males, pray tell how you did it? lol, peace out.........gm
There are a few different ways to encourage males/females, but TBH, i reckon most of the factors arent that strongly influential. It could be just really bad luck.
I have only been growing about a year and have quite a high female:male ratio, but im not exactly sure why. I reckon its the genetics.
I have only been growing about a year and have quite a high female:male ratio, but im not exactly sure why. I reckon its the genetics.
Sorry Hell9, it is not the genetics. Think about it, any species that produced (genetically) males only would soon go extinct. As to the female/male ratio in Cannabis, there are two theories about the sexing. One is the epigamic (non-genetic) theory, claiming that the sex is chosen by the plant due to external stimuli of some sort, and the genetic inheritance theory, claiming that the sex is predetermined by its set of chromosomes. Robert C Clarke gives a more thorough explanation of this in his book "Marijuana Botany" (which saves me the effort). To cut it short, the most convincing answer to this is that both theories are right. The Cannabis seed do have a predetermined sex, but external stimuli (growing conditions) and stress can cause the young plant to change sex. It is generally concidered that the third week is crucial in sex determination - depending on how far the seedling has evolved. Therefore, no Cannabis strain has a predestined male/female ratio (although certain strains are more likely to hermaphrodite), it all depends on how you grow it. Dutch Passion Seed Company experimented with sexing for years and came to the following conclusions about male/female ratios:
a higher nitrogen concentration will give more females.
a higher potassium concentration will give more males.
a higher humidity will give more females.
a lower temperature will give more females.
more blue light will give more females.
Fewer hours of light will give more females. It is important to start these changes at the three-pairs-of-leaves stage and continue for two or three weeks, before reverting to standard conditions.
You could add several stress factors such as overferting, overwatering or strong wind to increase the male ratio. It boils down to that if you create ideal conditions (for the Cannabis plants), the female ratio will be high (many females=more seeds=higher propagation of the species) whereas if the living conditions are less hospitable, the male ratio will increase (many males=greater competition in pollination=less seeds=lower propagation of the species). It's a regulating mechanism within the species. If you get only males on 10-12 seeds or more, I see only two options. Either you're doing something terribly wrong, or you simply think you identified males while in fact you failed to identify the females. On or the other, you will have to check your routines in order to find out where you go wrong.
a higher nitrogen concentration will give more females.
a higher potassium concentration will give more males.
a higher humidity will give more females.
a lower temperature will give more females.
more blue light will give more females.
Fewer hours of light will give more females. It is important to start these changes at the three-pairs-of-leaves stage and continue for two or three weeks, before reverting to standard conditions.
You could add several stress factors such as overferting, overwatering or strong wind to increase the male ratio. It boils down to that if you create ideal conditions (for the Cannabis plants), the female ratio will be high (many females=more seeds=higher propagation of the species) whereas if the living conditions are less hospitable, the male ratio will increase (many males=greater competition in pollination=less seeds=lower propagation of the species). It's a regulating mechanism within the species. If you get only males on 10-12 seeds or more, I see only two options. Either you're doing something terribly wrong, or you simply think you identified males while in fact you failed to identify the females. On or the other, you will have to check your routines in order to find out where you go wrong.
Rosy Cheeks said:
Interesting and well-put response. Good stuff. I had read the Dutch Passion info before and was going to reference it, but i didnt pay it much attention until now cuz i have been very lucky with my f:m ratio (so far...) and i didnt implement any of the DP advice into my grows (on purpose anyway). I dont fert until about 4 or 5 weeks in, (i use Lite Mix soil from Biobizz though). Maybe my conditions are just good for females, even just by luck.
Id ike to hear some threshold values for 'lower temps' and 'higher N' etc. It all sounds a bit flakey to me but im stoned and trying to get my head around this and a thousand different factors are presenting themselves at once and im getting confused!
But ya, I agree, there must be something seriously going wrong, but i reckon its a combo with some bad luck genetically also.
The Iceman
Active member
I think sex if determined by the genetics and that Dutch Passion such is just speculation....no scientific facts to back there theory at all....its a matter of luck or badluck what you get from seeds and thats why you should always grow atleast two packs of beans
It's hard to say what is "ideal conditions" is for a Cannabis plant. One would have to assume that it is different for a tropical sativa and a Hindu Kush Indica, in terms of climate, constitution of soil etc. Indoors, we try to recreate nature's magic growroom but never really make it. There's still no better light than the sun, no better ventilation than a light summer breeze... Personally, I keep young seedlings under horticulture neons on 18/6 and temps around 22° (71-72f), I feed them a rather even N-P-K and foliar feed extra nitrogen if needed, I ph my water with nitric acid (not phosphoric acid), I keep air humidity between 60-80% (plus regular mistings), I avoid strong ventilation, any kind of stress and read them any bedtime story that they want to hear. I regularly get a 60%-80% female ratio, I've had even higher but without knowing why. I personally concider high air humidity as a key factor, a low air humidity will almost certainly boost the male ratio.
Hey there Radneo, what's cooking?
Tokin White Guy
Member
damn, you suck dude, you should prolly just kill yourself now while you're ahead
lol, j/k bro check this link out
http://www.planetganja.com/highsociety/showthread.php?t=11252
mostly prolly what Rosy said, but check it out anyway
lol, j/k bro check this link out
http://www.planetganja.com/highsociety/showthread.php?t=11252
mostly prolly what Rosy said, but check it out anyway
