24 Hours On, Followed by 12 hours dark....

Looking for insight....If I were to run my flowering lights 24 hours on straight, then turn them off for 12-14 hours, then back into 24 hours of light, would the plants still flower? Do you think the times would throw the plant off? I know cannabis needs at least 12 hours of continued darkness to flower in photoperiod plants.....but nothing is said about how much light they can take? Cannabis, like corn can take lots and lots of light. Thoughts????
 

Gentlemancorpse

Cannabis Chaotician
I dont think it would work... I think every 24 hour light cycle they would begin to reveg or prevent them from entering into flowering... in nature its shorter days that trigger flowering, not longer nights (I know they go hand in hand so it's kind of a moot point)

I'd love to see someone run some expirements to find out EXACTLY how many hours of light cause cannabis to begin flowering, its always seemed unlikely that its 12/12 precisely, but we play it safe because we know it works
 
Thats a good way to produce hermies lol

Theres established light times for a reason thats my 2 cents :D

18/6

12/12
Oh I am not messing around with it at all....would be a pain in the ass with a timer lol. Just curious though if it would work since it's still getting the dark needed. I mean the plant would be used to it prior to actually flowering if you did it from flip. Just a though, nothing more.
 
I dont think it would work... I think every 24 hour light cycle they would begin to reveg or prevent them from entering into flowering... in nature its shorter days that trigger flowering, not longer nights (I know they go hand in hand so it's kind of a moot point)

I'd love to see someone run some expirements to find out EXACTLY how many hours of light cause cannabis to begin flowering, its always seemed unlikely that its 12/12 precisely, but we play it safe because we know it works
Yea just something I was pondering around with...nothing more then poking my nose up a tree that dont need my nose being near lol.
 
From what I've read, this won't really work well, because the plants basically measure the amount of darkness they receiver over a 24 hour period and then that "timer" resets and measures the darkness again over the next 24 hours. So, for example, the first 12hr dark period would trigger the flowering hormones, but then the lack of any darkness over the next 24 hours could confuse the plant into thinking it should be in veg and could cause it to start the reveg process. I would think that, even if the plant managed to stay in flower, that it would probably cause some really strange growth and probably cause it to go into survival mode and herm.
 

spyralout

🌱🌿🌲🔥💨
Staff member
When we grow cannabis indoors, we are manipulating a buncha different factors, light spectrum, time, environment, etc in a more precise manner than outdoor. So every little tweak will fuck with the plant. I don't think what you asked above will work very well, I agree w Dabbie, that's a good way to hermie/seed up your indoor garden.

Outdoors, the plants get acclimated to the changing weather patterns. So say one night it's really cloudy and there are no stars or moon to shine through. Next day it is. Then next day it's cloudy again. Because of the longer season, the plants have time to adjust. Now throw a street light into the mix. That totally fucks things up. You'll likely have a plant that takes a long ass time to flower, and may miss the season.

I ran 13/11 last run. I had far red initiator pucks to put them to sleep sooner. I did see a difference in how fast they matured. Even for a longer flowering sativa strain.
 
Plants being grown inside would not know what a 24 hour period is like our outside plants that depend on the sun setting and rising to create a 24 hour period....so why would a long day period even matter as long as the plant gets the 12 hours of dark needed to produce the hormone needed to flower...
 
Plants being grown inside would not know what a 24 hour period is like our outside plants that depend on the sun setting and rising to create a 24 hour period....so why would a long day period even matter as long as the plant gets the 12 hours of dark needed to produce the hormone needed to flower...
I honestly have no idea how they measure the 24 hour period but it could be as simple as them noticing the change in the gravitational pull of the moon throughout the course of the day. I'm pretty sure, though, that plants also have a built-in circadian rhythm.
 
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