Effects of photoperiod on Cannabis during Flowering...HELP!!!

Married2Jane

Married2Jane

Member
Hopefully someone can help, i couldnt find anything about it around.

How does decreasing the photoperiod affect the quality of the plant when its in the final 3 weeks before harvest?

Lets say after 7 weeks of flowering using a photoperiod of 12/12 it is decreased to 11/13 for one week then 10/14 for another week then 9/15 for a couple of days and finally 8/16 till it is ready for harvest.

Im thinking that would decrease the yield but increase the potency??

Does decreasing the photoperiod increase resin and trichome production?

So at 8/16 that would be when the plant is producing most trichomes and resin?

Please, a little bit more insight on this topic from the experienced growers would be very appreciated.
 
tyke1973

tyke1973

Well-Known Member
This is a hard one because the rule of thum is 12/12 off but in the summer some of my plants that i have left late have had less light.But i would not risk the harvest the plants need that light to gain more crystal formation.Some people will have differant ideas on this but i think that by messing around with a light sceduale is one of the worste things that you can do.This will just shock the plant whitch will inturn make for a smaller yeild.Stick to what is known and don't stray from what has been learnt from growers for years.If you are looking to bulk out your crop then there is ways of doing this without messing with the light give a 8 week strain a extra couple of weeks.In week 7 and 8 you can use granulated sugar but 1 teaspoon to every gallon of feed that is 4 ltrs of water.I like to add a small ammount of warm water to the sugar to melt it so it is not left in it's granulated form in the feed.You can also use rooting stimulants like superthrive but i have found this to bulk the final crop by up to 20% but if smokeing in a spliff has i do the spliff tends to go out alot and the bud becomes harsh.This will not happen with the sugar has long has the plants have 1 week of just water 2 if possible.
 
Married2Jane

Married2Jane

Member
Im not looking for big yields just good quality.

I have been using molasses for the past 2 weeks around 3 tblspoons per gallon....

Would the plant be shocked with decreasing the photoperiod if its done slowly i.e from 12/12 to 11/13 to 10/14 to 9/15 to 8/16. That would be trying to do it how nature does.

What am trying to understand is, does the plant produce resin and trichomes during the night times? SO longer night times means more resin and trichomes..

What do you think ?
 
I

Illegal Smile

Guest
If you shift from 12/12 you are entirely in the realm of superstition with no scientific basis whatsoever. I'm thinking don't do it.
 
Married2Jane

Married2Jane

Member
Illegal Smile said:
If you shift from 12/12 you are entirely in the realm of superstition with no scientific basis whatsoever. I'm thinking don't do it.
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If the cannabis plant produces resin and trichomes during night times, then it is quite logical to think that the more night it gets the more trichomes and resin it can produce.

But the question lying ahead would be how many hours of light are enough for the cannabis plant to store as much energy that can be used all night to produce the resin and trichomes...
i.e. would 8 hours of light everyday be enough for the plant to work 16 hours every night producing resin and trichomes??
 
T

T.H.Cammo

Well-Known Member
Married2Jane said:
SO longer night times means more resin and trichomes..What do you think ?
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Is this just wishful thinking - or do you actually have some (informed) reason to believe it's true?

I'm not aware of any benefit to be gained by extending the hours of darkness beyond the usual 12! Yes,it's true that plants "grow" during the hours of darkness. But that's not because of the darkness itself. Plants accumulate everything they use to grow during the hours of light (it's called "Photosynthesis"). Then they process the energy that they have stored up later, (at night) when they are not so busy. Most of the "Bodily Functions" that plants perform are carried out during the "Daylight" hours, so anything that can be postponed until darkness makes for a more efficient organism. It should be pretty obvious that plants still grow fine under a "24/7" photoperiod - with no dark period! Research will uncover many published sources that agree with this information.

I don't know that the duration of photoperiod has anything to do with potency, except in a general, overall "health", situation.
 
Married2Jane

Married2Jane

Member
T.H.Cammo said:
Is this just wishful thinking - or do you actually have some (informed) reason to believe it's true?

I'm not aware of any benefit to be gained by extending the hours of darkness beyond the usual 12! Yes,it's true that plants "grow" during the hours of darkness. But that's not because of the darkness itself. Plants accumulate everything they use to grow during the hours of light (it's called "Photosynthesis"). Then they process the energy that they have stored up later, (at night) when they are not so busy. Most of the "Bodily Functions" that plants perform are carried out during the "Daylight" hours, so anything that can be postponed until darkness makes for a more efficient organism. It should be pretty obvious that plants still grow fine under a "24/7" photoperiod - with no dark period! Research will uncover many published sources that agree with this information.

I don't know that the duration of photoperiod has anything to do with potency, except in a general, overall "health", situation.
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So what you are telling me is to stick to the 12/12 coz that will produce the best quality bud with most THC and Trichomes?

Sorry, but i find that hard to believe.

Cannabis needs long nights to flower. In other words, cannabis needs darkness to make buds and THC.

Cannabis uses light to produce energy. Cannabis produces more energy during the day than what is needed by it. The extra energy is stored to be used during times of no light.

So if cannabis produces X amount of energy and uses only Y amount during the day then it is left with Z amount of energy for the night times.

Now, the excess energy Z, that was left for the night might be more than what the plant needs all night. So we are left with A amount of energy that will not be used used.

You get me?

In other words, there will be excess energy that the plant will never be using.





So......Maybe 10 hours of light are only needed to produce the exact amount of energy that the plant needs for its 24 hours. Maybe 9, Maybe 8.

With giving it more light than what it needs you would just be wasting your time producing energy that is not needed instead of putting it to night work. More light means more vegetative growth, more breakdown of THC and less production of trichomes during the light period.

Do you follow me ??
 
T

T.H.Cammo

Well-Known Member
Sure! I hear what you're saying. And I'm sure that makes perfect sense to you!

The problem is that it doesn't work that way! You are assuming certain facts and twisting the outcome to comply with your, unfounded, expectations.

What evidence or source of imformation shows that more than 12 hours of darkness will result in better results? That's what we are really talking about - not mere opinions! Remember, "Opinions are like assholes, everybody has one - some just stink more than others!".
 
fatfarmer

fatfarmer

Active Member
well you try it and let us know. But the first thing to learning is to listen ,read and learn. we all want more bigger and better bud so good luck ,but don't put all your eggs in one bag!! Force Be With You!
 
Married2Jane

Married2Jane

Member
The problem is that it doesn't work that way!
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Well thats why im looking for experienced growers that can EXPLAIN how it works.
If you cant please dont waste my time.
I have read and looked everywhere before posting.

There is nothing about the effect of photoperiod length during flowering mentioned anywhere. Whether its longer nights or longer days during flowering.

People stick to the 12/12 because that is the safest choice.

Remember, some strains need 13 hours of dark to flower as i have read, so that means under a 12/12 they will NEVER flower.

What evidence or source of imformation shows that more than 12 hours of darkness will result in better results?
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What are better results for you? do you look for quality or quantity. As i said before... im looking for QUALITY.

well you try it and let us know. But the first thing to learning is to listen ,read and learn. we all want more bigger and better bud so good luck ,but don't put all your eggs in one bag!! Force Be With You!
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Im looking for BETTER not BIGGER.

Well im willing to try and see.



Why dont people on here try to help instead of just saying it doesnt work.

Did it take both of you a long time to understand how things work and want everyone to make it harder for everyone on here?
HAHA
 
T

T.H.Cammo

Well-Known Member
If you find it so hard to believe then , clearly, you haven't paid your dues doing research. You seem to believe some Voo-doo fantasy theory and, frankly, I don't feel the need to convince you otherwise.

Don't waste my time, do your own fucking research!
 
pastafarian81

pastafarian81

Well-Known Member
Married2Jane said:
.....



Why dont people on here try to help instead of just saying it doesnt work.

Did it take both of you a long time to understand how things work and want everyone to make it harder for everyone on here?
HAHA
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if you really researched this you would have found hundred of posts debating this. it comes up every few weeks and each time the OP thinks that they know better than everyone who trys to explain why it doesn't work.
 
T

T.H.Cammo

Well-Known Member
pastafarian81 said:
if you really researched this you would have found hundred of posts debating this. it comes up every few weeks and each time the OP thinks that they know better than everyone who trys to explain why it doesn't work.
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Thank you! I couldn't have said it better myself. In fact, you said it much more diplomatically.
 
D

dudeinshoes

Member
im wondering the same thing as poster... who clearly isnt listening.

im gonna leave it at 12/12, any effects of less light would probably be marginal anyway.

poster should remember that each plant, not just strain, is different...
 
Married2Jane

Married2Jane

Member
What the hell is wrong with you people?

None of you has tried explaining how it works.....

All of you jump to the conclusion "It doesnt Work" but no one explained WHY NOT.....

I am not saying I AM RIGHT. Maybe i am wrong, but an explanation of where exactly im going wrong would be more constructive.

If you cant explain it dont waste my time and your time. Move on to a different thread.. wtf??
 
W

Wetdog

Well-Known Member
Married2Jane said:
What the hell is wrong with you people?

None of you has tried explaining how it works.....

All of you jump to the conclusion "It doesnt Work" but no one explained WHY NOT.....

I am not saying I AM RIGHT. Maybe i am wrong, but an explanation of where exactly im going wrong would be more constructive.

If you cant explain it dont waste my time and your time. Move on to a different thread.. wtf??
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Well, if you want to bother to read, MARIJUANA BOTANY by Robert Connell Clarke, studies were done about this very thing.

Upshot is, reducing the daylight to 10 hours DECREASED potency and IIRC yield also.

You could duplicate the study yourself and find out the hard way, or get the book and do some research.:wall:

It's not a 'how to' book by any means, but a technical study of our favorite plant. Written on about the college level.

Wet
 
R

Resin225

Active Member
None of us here are ground breakers. Growing weed has been going on long enough that most of the common tweaks have been tried. There is plenty that has been written on this subject. I have yet to read anything that convinces me to try different than 12/12. Growing weed is a combination of genetics, nutes and environment. All of which change with each person, if not each different grow. It is a constant with many variables mixed in. If changes from the norm have ANY benefits, it would be put in to practice by at least some of the most successful/experienced growers. From the reading that I have done, the best growers understand MJ fully. Most just keep it simple. The more you want to believe that something works, the more you tend to ignore the negative info that comes from it. With that being said, go for it. See if it makes a difference to you. This is all just my opinion.
 
CLOSETGROWTH

CLOSETGROWTH

Well-Known Member
T.H.Cammo said:
If you find it so hard to believe then , clearly, you haven't paid your dues doing research. You seem to believe some Voo-doo fantasy theory and, frankly, I don't feel the need to convince you otherwise.

Don't waste my time, do your own fucking research!
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T.H. I totally agree with what your saying. Some people just cant get it through there thick head whats really going on. Ive helped out many, and barely ever get a Thanks for the "REAL" deal. I practically have give up.. No sense in talking to a door knob. Disrespectful if anything :(
 
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