It's not really necessary to provide links to that. But you should check that you arent a victim of superstitions, bro science
speak for yourself:
Sexing Cannabis: A three-part series from cannabis physiology and physical differences between sexual organs, to tips for sorting genders that works best for your medicinal garden. PART III: Tips for sorting genders: which method works [ā¦]
northcountybounty.com
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Manipulating light cycles
At any stage of vegetative growth cannabis plants can be forced to reveal their sex through successful manipulation of light cycles. Expose the plants to a longer night cycle, from either 24:0 or 18:6, to 12:12 and you can plan on seeing either āballsā or āhairsā within about a week. After a week the light cycle should be adjusted back to 24:0 or 18:6 so the plants will return to vegetative growth. While this method shortens the time it takes to sex a plant, it doesnāt always work. Some male cannabis plants originating in far northern areas are not photosensitive. This means you can not trigger flowering by manipulating the light cycle because it is age and the naturally occurring developmental stages of the plant that determines when the male displays sex and begins to flower. Also, some indica dominant plants donāt always want to return to the vegetative phase and can produce some bizarre and unwanted growths or even carry on into full bloom prematurely."
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"Using blue lighting
Cannabis is a short-day plant, meaning that as the days get shorter it determines when to flower based on the number of uninterrupted hours in darkness. The method by which cannabis determines and measures the length of a dark period is by using the hormone
phytochrome which can be found in 2 states:
- Inactive state ( Pfr): occurring when it absorbs red light spectrum at 666 nanometers
- Active state (Pr ): triggered i in as little as 2hrs of being exposed to complete darkness.
When high levels of flowering hormone (Pr) remain elevated over a critical period of time for several days, the plant will start to transition from vegetative growth to flower. The hours of darkness required to begin flower differs greatly by the different species of cannabis plants. Sativas, because they develop near the equator, require a longer period of darkness than indicas and some sativas will even continue vegetative growth in 10-11hrs of darkness which would otherwise cue most plants to flower. The active form (Pf) can be returned to its inactive state, stopping the flowering response, with interruption by red light around 660 nm or even
blue light; when Blue LED or fluorescent light is the only light used on an 18:6 light cycle, the plants will slightly begin flowering while simultaneously continuing vegetative growth. After sexing they can be returned to a full spectrum light at 18:6 to produce more a robust vegetative growth and halt the flowering process. This method works well for higher populated cannabis gardens that would make using the clone and sex method a bit tricky."
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notice that i never said i use thoose methods personnaly just that some do.