Is dark period really full dark night?

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DaFreak

Well-Known Member
Lalalando said:
Hey, autoflower grower here.
First time growing photo.
I've got one curious question. Since cannabis does not have full 12 hours of darkness during flowering phase in nature, is it really needed indoors?
I'm wondering if I really need tent for indoor growing (idc about smell and other stuff). Let's say place where I grow girls is not near some nature and other light source (window, table lamp, etc.) - is it okay to just set growing lights for 12/12 schedule, having girls on place where would be little of diffuse light from window until sun goes down.
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No, full darkness is absolutely not needed. There is this line between full darkness and a little darkness that if they cross they will hermie on you, and the fun part is that each strain that line is different. Finding that line would be a fools errand so we all make it easy on ourselves and just go for full darkness.
 
Merlin1147

Merlin1147

Well-Known Member
Out doors at sunset the spectrum goes to far red at sunset. Far red light changes the phytochomes from the active form Pfr to the inactive Pr (sleep mode). Indoors without the far red end of Day it takes hours for the Pfr to convert to pr So you need 12 hours indoors. I use 730 nm far red diodes End of day 5 minute before and after lights out to jump start flowering and then keep it going with 5 minutes after lights out to shorten maturation time. A grower friend uses the far red after lights out and then shortens his nights to 10.5 hours.
 
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DaFreak

Well-Known Member
Merlin1147 said:
Out doors at sunset the spectrum goes to far red at sunset. Far red light changes the phytochomes from the active form Pfr to the inactive Pr (sleep mode). Indoors without the far red end of Day it takes hours for the Pfr to convert to pr So you need 12 hours indoors. I use 730 nm far red diodes End of day 5 minute before and after lights out to jump start flowering and then keep it going with 5 minutes after lights out to shorten maturation time. A grower friend uses the far red after lights out and then shortens his nights to 10.5 hours.
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There is an article out odd flowering light cycles, jist of the article was that cannabis can only absorb so much light in their cells on any given day and after that point it wasn't used so was waste.

Any way, what do you get from 10.5 nights over 12?
 
Merlin1147

Merlin1147

Well-Known Member
DaFreak said:
There is an article out odd flowering light cycles, jist of the article was that cannabis can only absorb so much light in their cells on any given day and after that point it wasn't used so was waste.

Any way, what do you get from 10.5 nights over 12?
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Yeah, it makes sense the plant can only store so much carbohydrate. Not sure about the 10.5 vs 12, I think his thinking is that the extra 1.5 hours during flower will give bigger yields.
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
DaFreak said:
There is an article out odd flowering light cycles, jist of the article was that cannabis can only absorb so much light in their cells on any given day and after that point it wasn't used so was waste.

Any way, what do you get from 10.5 nights over 12?
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Google "cannabis DLI"
 
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