14/10 or 12/12 ?

[Ganja_Greg]

hey guys question... has anyone used the 14/10 method? is 12/12 just better all together and i shouldnt be using 14/10?
i did alittle research when i started the whole 14/10 2 weeks ago and it seemed logical to me at the time but now im not so sure. any help would be great!

here's my point...
dark = bud Growth?
light = plant and leaf growth?

ive seen a few ppl claim that 14/10 will help dwarf your plant (great for micro) and then some ppl say that it will ruin potency in the long run.
im switching back to 12/12 for now but just curious as to what
may be the long term effects of 14/10 lighting.

thanks all GG.

 

[trillions of atoms]

14 lights on 10 off? or the other way areound? the less light they get the less growth they get. so if you wanna turn the lights off for 14 hrs ...yes it will flower but growth and yeild will be hindered.

 

[Runbyhemp]

I'd stick with the tried and tested 12/12 schedule GG.

 

[Ganja_Greg]

14 lights on 10 off? or the other way areound? the less light they get the less growth they get. so if you wanna turn the lights off for 14 hrs ...yes it will flower but growth and yeild will be hindered.

14 off 10 on. ya i dont wanna make my yield less.

thanks RBH think all just stick to 12/12

 

[Hick]

Clark's book on botany, cites studies that say mj produces twice as much thc under 12 hours of light, as under 10. MJ BOTANY chapter 4, I think.

 

[King Bud]

One idea to simulate a more natural daylength is to start flowering at 14/10 and eventually get to 12/12 to finish. This will extend the flowering period by approximately 10% and also increase yield. These terms are expressed under the assumption that a full 24-hour cycle is used. This is the natural circadean rhythm that all living things have evolved to use and varying from a 24-hour cycle should be treated as experimental.

That's from GrowFAQ lighting basics, might be of interest.

 

[Runbyhemp]

This is the natural circadean rhythm that all living things have evolved to use

But ... natural circadian rhythm can be affected by environment and it has been proven that a plants circadian rythm can be changed.

Did quite a bit of reading on this last week (was trying to find out if it was unnatural to be growing 12/12 from seed)

A biological clock is an internal mechanism in a living organism that controls
the timing of physiological functions and activities. Biological clocks are found
in almost all living things and they control many of the rhythms that we can
observe in nature and ourselves every day.
Depending on the organism, biological clocks can follow one of several
rhythms. The names of these rhythms stem from the Latin word circa, which
means circle. The names refer to the circular nature of the rhythms. Seasonal
rhythms, such as migration and hibernation, are called circannual (circle of the
year) rhythms. Organisms that live near the ocean, such as fiddler crabs, often
follow circatidal (circle of the tide) rhythms, which repeat every 12.4 hours.
Circalunar rhythms repeat every 29 to 30 days and are tied to the rhythm of the
moon. Most organisms, including humans, follow circadian (circle of the day)
rhythms, or daily rhythms, which repeat every 24-hours. The sleep/wake
pattern of humans is an example of a circadian rhythm.

Biological rhythms can easily be observed in plants. Bean plants raise and lower
their leaves at the same time each day. Flowering plants, such as California
Poppies, Morning Glories and Four O’clocks, open and close their flowers at
certain times during each day. How is the biological clock controlled? Biological
clocks are endogenous, which means that they are controlled internally, not by
outside signals. A scientist named Jacques de Mairan experimented with the
biological clocks in Mimosa plants to see if the plants would continue to raise and
lower their leaves without the outside signal of the sun. He placed the plants in a
dark cabinet and made observations at regular intervals. He found that the leaves
continued to raise and lower, but they slowly drifted off of their original schedule. In
the cabinet, the plants were able to free run. The plants had no environmental
time cues to regulate their rhythms. When de Mairan took the plants out of the
cabinet, they were no longer in sync with the day/night cycle. From this experiment,
de Mairan concluded that biological clocks, although not controlled by outside
signals, are often in sync with, or entrained to the outside world. Entrainment
happens when an organism senses outside cues, such as light, and sends those
signals to its biological clock. When these outside signals are present, the
organism follows the time cues of its environment, so that it is not operating in its
free running rhythm.

As Hick said, most THC is produced when 12/12. that's what I'd stick with.

 

[liermam]

Generally, the only time I hear of 14/10 on/off is towards the end of the flowering cycle, after flush commences. This is especially good for big stretchy sativas, or just non-micro plants in general. The extra light during flush helps plants metabolize whatever goodies left from the grow, encouraging both a little bit extra veg and extra bud production.

I've also heard of people doing 10/14 on/off for straight-shot micro grows, or even if they're LST'ing and pinching. I have no idea how well it works, but its not unheard of.

 

[smokybear]

I would definately stick to the 12/12 schedule. Its a tried and proven method and is very effective. Good luck and grow it big.