increased yeild with photoperiod

[moash]

i found this while browsing around
has anyone ever tried this???



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

 

[bushmang]

sounds interesting i wonder if it really works. if im getting this right you give them 36 hrs of light and then 12 hrs of darkness and then 36hrs again? would be great if there was a time laps video or some pics of the buds etc.

 

[Ghost420]

what week in flower is this applied?

 

[moash]

sounds interesting i wonder if it really works. if im getting this right you give them 36 hrs of light and then 12 hrs of darkness and then 36hrs again? would be great if there was a time laps video or some pics of the buds etc.

no i think its 21:36 on and 12 off,stretching the flower time out so it can yeild more i.e 8 weeks takes 10

 

[moash]

what week in flower is this applied?

i suppose the beginning

 

[wilsoncr17]

i suppose the beginning

It would probably confuse the plant if you did it right away. It takes a plant at least a week to realize it's in flower, so if it wasn't getting the dark cycle in a timely enough fashion, it may never decide to flower, but I'm not sure, my Phd is in acting, not Rocket Surgery.

 

[Don Gin and Ton]

ive read bout this but not quite the length of time so long as 21:36 only like 12/14 but seeing as most of the plant activity happens when the lights are off it only stands to reason longer dark = longer buds ive been thinking about trying this for a while but to truly know we need a side by side comparison 2 tents say same strain nutes medium etc 2 light cycles.

if i had a second tent id have done it by now and im changing mny strains every month or so so its not really an option.

anyone else with two grow areas that would be able to try this id be real interested to see the results.

rep moash

 

[Redeflect]

For simplicity rather than 5 nights a week, someone could do less and 6 nights a week...

6 hours on 12 hours off (total of 6 28 hour days during the week).

Every day, you would just shut off the lights 4 hours later. It wouldn't take as long as with a 21:36/12 cycle to reach the end of flowering (only about 15% longer, as opposed to about 40% longer)

 

[moash]

It would probably confuse the plant if you did it right away. It takes a plant at least a week to realize it's in flower, so if it wasn't getting the dark cycle in a timely enough fashion, it may never decide to flower, but I'm not sure, my Phd is in acting, not Rocket Surgery.

that could be...or it will take longer to start flower thus increasing time to elongate

 

[moash]

ive read bout this but not quite the length of time so long as 21:36 only like 12/14 but seeing as most of the plant activity happens when the lights are off it only stands to reason longer dark = longer buds ive been thinking about trying this for a while but to truly know we need a side by side comparison 2 tents say same strain nutes medium etc 2 light cycles.

if i had a second tent id have done it by now and im changing mny strains every month or so so its not really an option.

anyone else with two grow areas that would be able to try this id be real interested to see the results.

rep moash

i would like to try too but only got one closet to use
maybe 2 diff grows with same strain and conditions will give a round about answer and its more reasonable

 

[Don Gin and Ton]

yeah i think its wishful thinking moash co ordinating one grow let alone two for us bunch of stoners.....

 

[Brick Top]

I have read different theories about light cycle manipulation before where the idea was to increase the hours of light in some ways at some times. I have never seen anything concrete about how beneficial, if beneficial at all something like that would actually be. I think it might fall into the category if ideas that work but also have some counterproductively to them that at times is worth it and other times it is not and I always felt this sort of thing fell into the not group.
　
During daylight hours plants multitask, they allocate their energy and resources to virtually every function. During hours of darkness plants run on stored energy and they stop multitasking and allocate most energy to the most vital functions. Growth and THC production are two of those.

Basically plants grow more efficiently in certain ways during hours of darkness and much less efficiently during hours of light so I have to think there is a balance point where if gone beyond you could lose instead of gain.

THC in part works as a sunscreen and is broken down by light so while you extend overall energy intake to the plant you increase THC degradation. That means the plant has to replenish that much more lost THC during the hours of darkness than normal but then still have to be able to make more so there is that slow gradual increase.

I tend to expect that someone would need some mighty highfalutin gadgetry to find the balance point and then find out how much it would effect different strains, if it was not an even equal sort of effect.

I’m pretty sure there is something out there that is better than the standard light cycles but it may come down to will the difference in results be enough to justify making the change?

 

[moash]

in the quiet words of the virgin mary....cum again
i gotta give it to ya brick...u always say some fly ass shit
i didnt think about thc degradation....
+rep

 

[Don Gin and Ton]

thats some informed info right there bricktop. i wonder if you could counter the counterproductivity with uvb?!? as you say it would probably require some piece of fancy machinery to know exactly

 

[bushmang]

i remember reading in high times about this box this Canadian dude made that controls 8 lights but turns them on and off based on temperature and has a cycle for the on off thing so that a when a light turns off it makes sure it cycles them for an even disburse of light. the article is called yield of dreams

http://www.zinio.com/reader.jsp?issue=416078335&pss=1

its on page 52 check it out might be a better alternative. in this system they also finish two weeks later than usual but covers a huge area with lower amounts of wattage used and the yield seems crazy.

 

[Redeflect]

You could always alter the light cycle to 16/12 to give the plant more daylight and energy in the beginning and during the two growth spurts (week 2 and 5 usually). During regular budding leave it at a simple 12/12. During the last 2 weeks when the plant focuses on maximizing resin running 12/16 to give it lots of night time and very little THC degradation.(Just as people sometimes use MH during the last week or 2 to increase resin, giving more darkness may help as well).

This way you're giving it more energy when it's growing a lot, and getting it into the habit of thinking it needs lots of "sunscreen"(If that's what THC really is primarily for, that hasn't been proven)... and then at the end forcing it to resinate quickly with very little degradation.

The best plants are always grown by altering their environment to meet their needs.

 

[degggz]

from my understanding ...... and shit who knows with this stuff......
But from what I have heard (I haven't tried but am about to ) if you were possibly looking for an early harvest
then you would start giving the plant more darkness to help the buds ripen .... but as for getting a bigger yield
I don't know (how?)... plants need lumens to grow ... they dont get lumens at night .

 

[degggz]

oh lol n/m I just read what brick top said , oops stoner mistake
makes sense that they would store energy

 

[Barrelhse]

It would probably confuse the plant if you did it right away. It takes a plant at least a week to realize it's in flower, so if it wasn't getting the dark cycle in a timely enough fashion, it may never decide to flower, but I'm not sure, my Phd is in acting, not Rocket Surgery.

"I'm not a Rocket Surgeon, but I play one on television."

 

[fureelz]

With that cycle you can only do it for 1 week??, saturday it ends at 6pm and sunday it starts at 6am, 12 hours...wouldn't it shock the plant come monday if you were to continue the cycle?