it and 4 others were put into 12/12 , out of the five two were female , so i put them back into 24/0 for a month , once revegged for that month i took clones and couldnt believe when i started seeing males in the flower room , espesially when both moms still sat there showing female , so i flipped them both to 12/12 and one went poof male , so i killed it
sarcasim is not needed on a help and info forum and kinda childish
Sorry, but as you didn't flower them out to maturity then you can't say for sure they were female. How long were they in 12/12? Just till you sexed them, right? So you saw some some preflowers and identified them as female, then revegged and took cuttings then those cuttings showed male flowers under 12/12? Then the mother was put into 12/12 and it showed male flowers, a mother that had only been identified as female after a short time in 12/12 previously?
None of this proves that the plant was ever a female or a male, what you saw could easily be explained as intersex expressions. I've seen similar things happen a ton of times, I've had plants that had male preflowers when first expressing sex in 12/12 then grew into lovely females after I picked off the few male preflowers and never showed another male flower in a half dozen runs from cutting. I've had plants that I put in 12/12 and showed female preflowers that when cloned grew balls while sat in my propagator. I've seen plants that showed female preflowers in veg and when clones and flowered grew as females later grow both males and female flowers when a different clone of the same plant was flowered.
In my current run I had a Jack Herer x Bubblegum plant that showed male preflowers after about 14 days of 12/12, I decided to keep him flowering because he was the nicest Jack x Gum male I have seen so far. That plant has been tucked away in the back corner of my space. Today, 10 days after it showed me tiny balls I moved the plants blocking my view of it to check how it's doing and if any male sacks were looking like they may open soon. To my immense surprise it now had only female flowers and not a male sack in sight. It has me thinking I misidentified it's sex, and i didn't take a pic of it's balls so am going on memory, but I'm positive it had male balls ten days ago. This means one of two things has happened - either I misidentified the preflowers as balls when they were actually calyxes or the balls I saw were balls and this is a female that has an intersex trait, both are very feasible and have happened to me before, I just don't believe in spontaneous gender switching. I have seen several plants that had male flowers when first sexed turn out to be females. Intersexed plants sometimes grow male and female flowers at the same time, that's very common. However, instersexed plants sometimes grow male and female flowers at different times in their life cycle, that is not as common but definitely happens as I've seen it several times.
None of this amounts to evidence that males and females can switch gender mystically at will, it's intersexed plants growing different gender flowers at different times, probably due to stresses such as being moved from 12/12 to 24/0 lighting schedules. I've seen sativas from Asian imports that flowered as a female for a couple of months suddenly shoot new branches out of the tops of their buds that contained only male flowers, this to me shows that what I'm saying about intersexed plants being able to switch between what type of flowers they grow at random is correct, if the timing of switch were different and not halfway through it's flowering cycle then I could see how this would appear to be a plant changing it's gender. Sometime intersexed plants grow both male and female flowers at the same time, sometimes they grow female flowers only with just the odd one or two male flowers, that's very common, sometimes they grow just male flowers then switch to just female with or without the odd new male flower. I think this is all just intersex issues rather than sex switching. Only once have I had a plant that grew equal number of male and female flowers right from the get go, that was a Mexican bagseed. I believe intersexed plants are caused by damage to the autosomes where the genes for sexuality are, often this damage doesn't manifest itself unless the plant in stressed.
Neither of us were taking notes or working in any kind of way that would support valid scientific observations so our experiences can't be taken as hard and fast fact of course.
Until someone comes along with a published and creditable scientific paper that says cannabis plants can switch sex then I'm not buying it, it's just so much more likely that what is actually happening is expression of the intersex trait and those expressions taking on different forms, at different times in the life cycle.
In any other category of horticulture where legal plants were grown, such as food and fruit crops, this issue would have been decisively resolved long ago through large-scale crop trials but because cannabis is largely illegal all round the world then no-one is doing large-scale crop trials with Cannabis as the subject so there are many gaps in our knowledge of many aspects of Cannabis, the nature of it's sexual expression mechanism being a prime example as Nev earlier pointed out.