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Mushrooms, Mycology and Psychedelics > The Ethnobotanical Garden
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Question regarding light hours with hydroponic cannabis
    #8099561 -

My friend has a single plant growing under a 400w HPS that has been flowering for a few weeks.

Currently it is on 8 hours of light, 16 hours dark

is he able to knock it back to more hours of dark to speed up flowering?

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8099693 -

usually all u need is 12/12


--------------------
And they wandered off.. nine ways till bedfast.
-----
"And lets pray that there's intelligent life somewhere up in space 'cause theres bugger-all down here on earth!"  -Monty Python's "The Universe Song" from The Meaning of Life
"In the beginning, the universe was created. This has made a lot of people very angry and has been widely considered as a bad move."  -Douglas Adams "The Hitchhikers Guide to the Galaxy"
"If the words 'life, liberty and the pursuit of happiness' don't include the right to experiment with your own consciousness, then the Declaration of Independence isn't worth the hemp it was written on." -Terence McKenna

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Re: Question regarding light hours with hydroponic cannabis [Re: Zinglons Acolyte]
    #8099717 -

for floweirng? i was always under the impression that you needed more dark for the photosynthesis

we want to speed this shit up

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8099796 -

xk3m_indica said:
for floweirng? i was always under the impression that you needed more dark for the photosynthesis

we want to speed this shit up


i think youre mistaken, photosynthesis has little to do with flowering, photosynthesis is how the plant makes its food

cannabis releases the flowering hormone under a 12/12 or less cycle, this is unrelated to the photostynthetic process

if anything at all, depriving your plant of light will hurt its yield and slow it down

you cant rush nature dude, just chill and let her mature


--------------------
And they wandered off.. nine ways till bedfast.
-----
"And lets pray that there's intelligent life somewhere up in space 'cause theres bugger-all down here on earth!"  -Monty Python's "The Universe Song" from The Meaning of Life
"In the beginning, the universe was created. This has made a lot of people very angry and has been widely considered as a bad move."  -Douglas Adams "The Hitchhikers Guide to the Galaxy"
"If the words 'life, liberty and the pursuit of happiness' don't include the right to experiment with your own consciousness, then the Declaration of Independence isn't worth the hemp it was written on." -Terence McKenna

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Re: Question regarding light hours with hydroponic cannabis [Re: Zinglons Acolyte]
    #8099814 -

yeah yeah sorry i just realised my mistake

are you sure? ive read so many places that it's supposed to be less light than dark for the flowering stage?

it's on 8 hours light at the moment? is this not enough?

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8099821 -

8 hours is ok, 10 hours would be better, and its generally agreed that 12 hours is the max light cycle for their flowering stage


--------------------
And they wandered off.. nine ways till bedfast.
-----
"And lets pray that there's intelligent life somewhere up in space 'cause theres bugger-all down here on earth!"  -Monty Python's "The Universe Song" from The Meaning of Life
"In the beginning, the universe was created. This has made a lot of people very angry and has been widely considered as a bad move."  -Douglas Adams "The Hitchhikers Guide to the Galaxy"
"If the words 'life, liberty and the pursuit of happiness' don't include the right to experiment with your own consciousness, then the Declaration of Independence isn't worth the hemp it was written on." -Terence McKenna

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Re: Question regarding light hours with hydroponic cannabis [Re: Zinglons Acolyte]
    #8099828 -

so flick it up to 10? its been on 8 for about 3 weeks now, would it be ok to flick up to 10? will this hurt the plant at all? or would it be better just to leave it on 8>

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8099837 -

dont know about that, but it takes a while for the resin to build on the trichomes, wait about 3 more weeks and u should prolly be able to harvest then


--------------------
And they wandered off.. nine ways till bedfast.
-----
"And lets pray that there's intelligent life somewhere up in space 'cause theres bugger-all down here on earth!"  -Monty Python's "The Universe Song" from The Meaning of Life
"In the beginning, the universe was created. This has made a lot of people very angry and has been widely considered as a bad move."  -Douglas Adams "The Hitchhikers Guide to the Galaxy"
"If the words 'life, liberty and the pursuit of happiness' don't include the right to experiment with your own consciousness, then the Declaration of Independence isn't worth the hemp it was written on." -Terence McKenna

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8099871 -

where on earth did you hear 8 hours of light is better? I've never come across that, and I've recently spent a lot of time on the physiology of cannabis. The plant photosynthesizes sunlight during the day and produces adenosine tri-phosphate (Also known as ATP) from nutrients in the water. ATP is the "gasoline" of the cell. Cells do divide and the plant does grow during this time, but much slower than the next phase.
so during the dark cycle the plant switches its respiratory process to be actually very similar to ours. It uses the fuel (ATP for it, Burritos for us) to replicate it's cells and grow. Old damaged cells are either shed and replaced, or repaired (much like our sleep cycle).

Not giving it enough light means not enough food, and less growth. Too much light and the plant reverts to the vegetation stage, so 12 hours of light is generally assumed to be the most efficient levels.

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Re: Question regarding light hours with hydroponic cannabis [Re: ApJunkie]
    #8102002 -

Yup, what he said. Click it up to 12 hours, having only 8 hours of light will make your plant smaller and not speed anything good.


--------------------
LNC's official Alaskan stoner
:jackdaniels::drooling::jackdaniels:

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Re: Question regarding light hours with hydroponic cannabis [Re: Jadian]
    #8102037 -

damn, everyones said like 8 times, that 12 hours is better. Where the hell did you get the idea that it needs only 8 hours?

actually, i heard if you drop it under 9 or 8, it will think it's winter and STOP flowering. Yeah, you need to bring it up to like 11 or 12 man.

the plant is supposed to start flowering when it goes under 13 hours of light, but some plants start flowering at the end of august, or even until the beginning of april. Of course that's depending on where you live. But damn, it takes more than that.

well, do what you wish, but i'd say unless your using some HOT lamps, you should up it a bit.

here's the thing, when the plants are small, you want to use the smallest amount of light possible, so it doesn't hurt the plants. But once they get a few feet, you can fuckin scorch them, man, as long as they have thick leaves, a healthy grow rate, and are fuckin adequately watered. In the amazon, the plants get a major dose of sun, but it rains every other day non-stop, so they grow adequately with the energy the contain, and form enough thick and branching leaves to provide shade and protection from just burning or drying up too much.

as far as i know weed is mostly tropical or sub-tropical in origin, so i'm sure you can fuckin roast those fuckers, as long as they look sturdy and healthy, give me water, and raise the lighting.

and stop repeating yourself, that's like the 18th time you've said "are you sure, i heard it was 8 hours of light" just check the internet, no ones lying.

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Re: Question regarding light hours with hydroponic cannabis [Re: ApJunkie]
    #8102412 -

no, photosynthesis does not produce ATP, it produces glucose, the glucose is then broken down to produce ATP, by the mitochondria.


--------------------
now i hear the police comin after me

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Re: Question regarding light hours with hydroponic cannabis [Re: doitagain]
    #8102614 -

Yes thank you...

Obviously I'm aware of that, I didn't feel I needed to make my post any longer than necessary so I removed  a step here and there for brevity.

thanks for proving to everyone how smart you are.  :rolleyes:

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Re: Question regarding light hours with hydroponic cannabis [Re: ApJunkie]
    #8107363 -

so it will be fine if i knock it up from 8 to like 10 or 11 hours? its been flowering for about 4 weeks

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8107425 -

xk3m_indica said:
so it will be fine if i knock it up from 8 to like 10 or 11 hours? its been flowering for about 4 weeks


ya, do it


--------------------
And they wandered off.. nine ways till bedfast.
-----
"And lets pray that there's intelligent life somewhere up in space 'cause theres bugger-all down here on earth!"  -Monty Python's "The Universe Song" from The Meaning of Life
"In the beginning, the universe was created. This has made a lot of people very angry and has been widely considered as a bad move."  -Douglas Adams "The Hitchhikers Guide to the Galaxy"
"If the words 'life, liberty and the pursuit of happiness' don't include the right to experiment with your own consciousness, then the Declaration of Independence isn't worth the hemp it was written on." -Terence McKenna

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8109257 -

Please go to 12. your plants will grow faster, and tastier.

Edited by ApJunkie (03/06/08 12:27 AM)

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8124085 -

xk3m_indica said:
so it will be fine if i knock it up from 8 to like 10 or 11 hours? its been flowering for about 4 weeks


I'm just gonna say no. Do it on 12/12. Just do it. That's how it's done. STOP THINKING OF OTHER WAYS.

It should get at least 12 hours of light EVERY DAY until two days before the chop. You're just screwing yourself out of more time for the plant to grow and the bud to develop.


--------------------
LNC's official Alaskan stoner
:jackdaniels::drooling::jackdaniels:

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Re: Question regarding light hours with hydroponic cannabis [Re: Jadian]
    #8133658 -

well about a week ago my mateflicked it back up to 10 hours. seems to be doing better

if i fclick it up to twelve now, will it go all hermy?

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Re: Question regarding light hours with hydroponic cannabis [Re: indica]
    #8133706 -

most likely not


--------------------
And they wandered off.. nine ways till bedfast.
-----
"And lets pray that there's intelligent life somewhere up in space 'cause theres bugger-all down here on earth!"  -Monty Python's "The Universe Song" from The Meaning of Life
"In the beginning, the universe was created. This has made a lot of people very angry and has been widely considered as a bad move."  -Douglas Adams "The Hitchhikers Guide to the Galaxy"
"If the words 'life, liberty and the pursuit of happiness' don't include the right to experiment with your own consciousness, then the Declaration of Independence isn't worth the hemp it was written on." -Terence McKenna

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Re: Question regarding light hours with hydroponic cannabis [Re: Zinglons Acolyte]
    #8133962 -

most likely not as in there is a chance it will?

i dont want to be fucking with it much more than i already have

i used to be a member of overgrow and i swear to fucking christ in a lot of the FAQ's for hydro they mentioned turning the light hours back for flowering to 'trick' the plant into thinking it was going into winter to speed upflowering????


i would not have done this if i hadnt read about it

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Shop: North Spore North Spore Mushroom Grow Kits & Cultivation Supplies   Myyco.com Golden Teacher Liquid Culture For Sale   MagicBag.co All-In-One Bags That Don't Suck   Unfolding Nature Unfolding Nature: Being in the Implicate Order   Sporeworks.EU Spores for European Microscopy   Original Sensible Seeds Autoflowering Cannabis Seeds

Mushrooms, Mycology and Psychedelics > The Ethnobotanical Garden
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