Flower 24 on 12 off

T

T.H.Cammo

Well-Known Member
The biggest problem I see is the amount of "light" that the plant actually receives. A plant can only process so much light effeciently, that amount changes drastically at 16-18 hours of uninterrupted exposure. Anything over 18 hours straight is pretty much a waste of electricity. You would be paying 200% for the power bill; but only harvesting 110, or maybe, 125% more buds. But, by all means, go for it!
 
mudballs

mudballs

Well-Known Member
PJ Diaz said:
You will also get 50% less dark intervals, which means less pr/pfr conversions. Not sure how this will affect the plant over weeks.

I've done shorter than 12-hr dark intervals (and proportionately longer light hours) by using far red end of day treatment. You can easily do 13/11 (light/dark) or potentially even 14/10, depending on the strain.
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quoted cuz this guy knows shit, you should listen to him. Op you're playing with short-day photoperiods in case you didn't know, which i have a feeling you don't.
By sensing the Pr/Pfr ratio at dawn, a plant can determine the length of the day/night cycle. In addition, leaves retain that information for several days, allowing a comparison between the length of the previous night and the preceding several nights. Shorter nights indicate springtime to the plant; when the nights become longer, autumn is approaching. This information, along with sensing temperature and water availability, allows plants to determine the time of the year and adjust their physiology accordingly. Short-day (long-night) plants use this information to flower in the late summer and early fall, when nights exceed a critical length (often eight or fewer hours).

i think Op will have a reveg in a short amount of time., but i do applaud him actually doing it. no better proof than your own eyes.
Edit, this says your hypothesis should be flipped, 24hrs dark, 12hrs light should be tested.
 
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ttystikk

ttystikk

Well-Known Member
I've seen people use 7 day digital timers to adjust their daylight shorter to get an extra "day" or two in a week's time.

I've also seen people just go with shorter days and longer nights, as short as 6 hours on and 18 off.

I'm curious what results this approach will have.

Carry on!
 
A

Apalchen

Well-Known Member
So what happened are they revegging yet? If you start seeing single leaves that don’t look like cannabis leaves then your revegging
 
xtsho

xtsho

Well-Known Member
Someone tried this back in 2015.

flowering 24/12

Got some 5 week old feminized plants that were just put into flower. Ive wondered if i maintained 12 hours of darkness, if i cud increase the lights on period. Well i already had a bunch of 7-day timers and set em up so lights are on 24 hrs then off 12 except sat and sun which are 12/12 (so that...
www.rollitup.org


"Most likely safe to assume that my 24/12 cycle will NOT flower plants... "

flowering 24/12

Got some 5 week old feminized plants that were just put into flower. Ive wondered if i maintained 12 hours of darkness, if i cud increase the lights on period. Well i already had a bunch of 7-day timers and set em up so lights are on 24 hrs then off 12 except sat and sun which are 12/12 (so that...
www.rollitup.org
 
anomalii

anomalii

Well-Known Member
So this thread has got me thinking. Flowering is triggered when the light cycle reaches 12/12. Or is it just equal amounts of light and dark?

Lets assume a day = 48 hours? Could you veg under 38/10 and flower with 24/24?

Why? No particular reason, just stoned and this post got me thinking “those” thoughts.

Could you trick a seed into thinking a natural light cycle lasted 48 hours?

Curious as to your thoughts?
 
weedstoner420

weedstoner420

Well-Known Member
xtsho said:
Someone tried this back in 2015.

flowering 24/12

Got some 5 week old feminized plants that were just put into flower. Ive wondered if i maintained 12 hours of darkness, if i cud increase the lights on period. Well i already had a bunch of 7-day timers and set em up so lights are on 24 hrs then off 12 except sat and sun which are 12/12 (so that...
www.rollitup.org


"Most likely safe to assume that my 24/12 cycle will NOT flower plants... "

flowering 24/12

Got some 5 week old feminized plants that were just put into flower. Ive wondered if i maintained 12 hours of darkness, if i cud increase the lights on period. Well i already had a bunch of 7-day timers and set em up so lights are on 24 hrs then off 12 except sat and sun which are 12/12 (so that...
www.rollitup.org
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How in the heck did you manage to find that??

I look at it like this - when lights are off, the plant builds up hormones that tell it to flower. When they build up to a certain point (due to long periods of uninterrupted darkness), flowering starts/continues.

Then when the lights come on, hormones build up that tell the plant to veg/not flower. Too much of that building up (i. e. too long light periods) and the plant stops flowering, or never starts.

So the 12 hours of dark is cool, but the 24 hours of light is too long and will oppose/override the effect of the 12 hours of dark.
 
xtsho

xtsho

Well-Known Member
weedstoner420 said:
How in the heck did you manage to find that??

I look at it like this - when lights are off, the plant builds up hormones that tell it to flower. When they build up to a certain point (due to long periods of uninterrupted darkness), flowering starts/continues.

Then when the lights come on, hormones build up that tell the plant to veg/not flower. Too much of that building up (i. e. too long light periods) and the plant stops flowering, or never starts.

So the 12 hours of dark is cool, but the 24 hours of light is too long and will oppose/override the effect of the 12 hours of dark.
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Google
 
D

Dape Green

Well-Known Member
Seems to me this is backwards. I made a mistake on my timer once and ran 10 on/14 off and it finished quicker with less yield.
I would think the problem with your little experiment is that plants have a limited amount of light they can absorb per lights on cycle, referred to as DLI. Some guys who run more intense lighting actually run 11 on/13 off. As for light off, you need a certain amount of uninterrupted darkness to develop enough hormone called florigen to flower, 12 hours is a safe bet to reach those levels. I think you will have a seedy mess that won’t finish. Just my 2 cents.
 
Wastei

Wastei

Well-Known Member
F_T_P! said:
Heard that this will work and I am going head first into it. Had some issues on the home front and it put my girls behind a few days in mid flower. This technique crossed my mind when I was thinking about making up for lost time, everything I have read or watched on the subject says it is good to go. The 12 hour dark period is the controller of flower, so 24 hours on does not effect the flowering cycle. Only problem I have is there are not enough slots in any timer to run my pumps for 7 days straight so need to adjust them everyday, not a big deal if you do not travel. If this works you could in theory run a 9 week plant in 6.75 weeks. Has anyone tried this or thoughts on automation?
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Have you heard of DLI - daily light integral?
 
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