earthwyrms
Active member
hi, i had an idea and wanted to try it so here is my idea
also
links to threads on alternate photoperiods, because, while there is info on different threads, re-finding them by search engine and search bar, isn't always fruitful.
here is an ongoing thread on alternate photoperiods,
Effects of different photoperiods on flowering.
https://www.icmag.com/ic/showthread.php?t=156499
21/12 in flowering.. huh?
https://www.icmag.com/ic/showthread.php?t=65713
18/12 light cycle
https://www.icmag.com/ic/showthread.php?t=72995
Anyone tried 18 hours dark 6 hours light during flower?
https://www.icmag.com/ic/showthread.php?t=331650
on page #1 post #7
phaeton writes
"13/10 with Far Red at twilight and full spectrum during the day is closest to nature and gives best yield with the least stress.Without the Far Red 11/13 appears to be the best average."
11/13 is what i went with for long flowering sativas. the lights have far red as well
Re: 21:36/12 photoperiod
http://www.420magazine.com/forums/frequently-asked-questions/74166-21-36-12-photoperiod.html
on page #1 post #3
medical marijuana writes
"The only photoperiod manipulation from years of experiments that offered discernible improvements was the following photoperiod adjustment made for 1 or 2 calendar weeks at the point of maximum flowering rate: Daylength of 21 hours, 36 minutes with a dark period of 12 hours. To accomplish this, you need a 7 day, 24 hour digital timer. During a 7 day calendar week on Earth, the "sun" only cycles 5 times."
here is the quote in full
"
Re: 21:36/12 photoperiod
I ran across something that is in the experimental stage if you are interested.
[DISCLAIMER]: This information is provided as experimental data and not fact.
The only photoperiod manipulation from years of experiments that offered discernible improvements was the following photoperiod adjustment made for 1 or 2 calendar weeks at the point of maximum flowering rate: Daylength of 21 hours, 36 minutes with a dark period of 12 hours. To accomplish this, you need a 7 day, 24 hour digital timer. During a 7 day calendar week on Earth, the "sun" only cycles 5 times. This permits easily switching back to the regular 12/12 at your discretion. You may want to only alter during peak flower production to stimulate the plant's metabolism. Using this photoperiod throughout the flowering cycle will cause this:
A variety that takes 49 days of 12/12 to mature, won't see 49 - 12 hour dark periods under 21:36/12 until almost 10 calendar weeks have passed.
The total increase in light energy is almost 80%, which will produce larger yields, if all of your other enviromental conditions are kept optimal.
The total increase in flowering period is only 40%, half the potential room for improvement. This means you don't have to be perfect to win out.
Selective application of the 21:36/12 photperiod for only 1 or 2 weeks extends the wait only 2 to 4 Earth days, which makes up the missing 2 complete day and night cycles each week on Planet Ito. This permits the additional light energy to be provided without purchasing additional equipment or overloading existing circuits, which maximizes the existing system's capabilities. The main advantage is that matched with co2 and optimal nutrition, the plants metabolism will increase dramatically. I have only successfully tested this photoperiod for two weeks. The potential for a net increase of 40% over the entire cycle (80% increase in light energy vs. 40% longer wait) is worthwhile. Don't be afraid!
Day 1 - Sunday, 6:00am til Monday, 3:36am
Day 2 - Monday, 3:36pm til Tuesday, 1:12pm
Day 3 - Wednesday, 1:12am til Wednesday, 10:48pm
Day 4 - Thursday, 10:48am til Friday 8:24am
Day 5 - Friday, 8:24pm til Saturday 6:00pm
"
OK, now on to what this experiment is
also
links to threads on alternate photoperiods, because, while there is info on different threads, re-finding them by search engine and search bar, isn't always fruitful.
here is an ongoing thread on alternate photoperiods,
Effects of different photoperiods on flowering.
https://www.icmag.com/ic/showthread.php?t=156499
21/12 in flowering.. huh?
https://www.icmag.com/ic/showthread.php?t=65713
18/12 light cycle
https://www.icmag.com/ic/showthread.php?t=72995
Anyone tried 18 hours dark 6 hours light during flower?
https://www.icmag.com/ic/showthread.php?t=331650
on page #1 post #7
phaeton writes
"13/10 with Far Red at twilight and full spectrum during the day is closest to nature and gives best yield with the least stress.Without the Far Red 11/13 appears to be the best average."
11/13 is what i went with for long flowering sativas. the lights have far red as well
Re: 21:36/12 photoperiod
http://www.420magazine.com/forums/frequently-asked-questions/74166-21-36-12-photoperiod.html
on page #1 post #3
medical marijuana writes
"The only photoperiod manipulation from years of experiments that offered discernible improvements was the following photoperiod adjustment made for 1 or 2 calendar weeks at the point of maximum flowering rate: Daylength of 21 hours, 36 minutes with a dark period of 12 hours. To accomplish this, you need a 7 day, 24 hour digital timer. During a 7 day calendar week on Earth, the "sun" only cycles 5 times."
here is the quote in full
"
Re: 21:36/12 photoperiod
I ran across something that is in the experimental stage if you are interested.
[DISCLAIMER]: This information is provided as experimental data and not fact.
The only photoperiod manipulation from years of experiments that offered discernible improvements was the following photoperiod adjustment made for 1 or 2 calendar weeks at the point of maximum flowering rate: Daylength of 21 hours, 36 minutes with a dark period of 12 hours. To accomplish this, you need a 7 day, 24 hour digital timer. During a 7 day calendar week on Earth, the "sun" only cycles 5 times. This permits easily switching back to the regular 12/12 at your discretion. You may want to only alter during peak flower production to stimulate the plant's metabolism. Using this photoperiod throughout the flowering cycle will cause this:
A variety that takes 49 days of 12/12 to mature, won't see 49 - 12 hour dark periods under 21:36/12 until almost 10 calendar weeks have passed.
The total increase in light energy is almost 80%, which will produce larger yields, if all of your other enviromental conditions are kept optimal.
The total increase in flowering period is only 40%, half the potential room for improvement. This means you don't have to be perfect to win out.
Selective application of the 21:36/12 photperiod for only 1 or 2 weeks extends the wait only 2 to 4 Earth days, which makes up the missing 2 complete day and night cycles each week on Planet Ito. This permits the additional light energy to be provided without purchasing additional equipment or overloading existing circuits, which maximizes the existing system's capabilities. The main advantage is that matched with co2 and optimal nutrition, the plants metabolism will increase dramatically. I have only successfully tested this photoperiod for two weeks. The potential for a net increase of 40% over the entire cycle (80% increase in light energy vs. 40% longer wait) is worthwhile. Don't be afraid!
Day 1 - Sunday, 6:00am til Monday, 3:36am
Day 2 - Monday, 3:36pm til Tuesday, 1:12pm
Day 3 - Wednesday, 1:12am til Wednesday, 10:48pm
Day 4 - Thursday, 10:48am til Friday 8:24am
Day 5 - Friday, 8:24pm til Saturday 6:00pm
"
OK, now on to what this experiment is