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How long does a plant need light?

Discussion in 'Newbie Central' started by Crazy88, Feb 20, 2007.


    Crazy88 Active Member

    With one plant just peaking outta the soil should it get light 24h a day or should it get 18h of light and 6h of dark? Someone I talked to said that they should always get light untill you want to sart blooming them.

    bigballin007 New Member

    Well this is all a matter of personal preference. I myself veg at 18/6 I have however have vegged at 24 hours of constant light until I changed to 12/12 for flowering and the only difference I noticed was a increase in my utility bills. In the end this is all up to you. I recommend 18/6.

    videoman40 Well-Known Member

    I totally agree with bigballin007, I try to mimick mother nature, I think you'd be hard pressed to improve on her.

    shiva Well-Known Member

    I vegged at 24 hours and then switched to 12/12 to flower... I only kept mine on 24 hours though as i was growing in my garage during winter and it helped keep the temperature up...

    If you're in a warm climate then I'd do 18/6 and then switch to 12/12

    rossweed1 Member

    hi every one i have a 3 week old plant and its about 1ft and i am giving it 24 hour light is that to much light please get back as i am realy keen to find out

    smppro Well-Known Member

    24 or 18 will both work fine, if there is a difference i doubt you will notice. Some people say more light the better, some people say the plants like the rest they get, the only real difference it will make is in your electric bill. There is no such thing as too much like while vegging.

    Oldreefer Well-Known Member

    I am currently growing several strains from seed.....and all have had 24 hr florescent since hatching a month ago. Doing great!
    Where in the hell am I?

    Where in the hell am I? Well-Known Member

    Hey, noob, start yer own thread

    smokealotapot420 Member

    Bro thats a really good way to look at it.. It actually make growing easier. I never thought of it like that until i read what you typed. Thanks!:bigjoint::leaf: Happy Toking:leaf:

    kophey Member

    has anyone tried with more than a 24 hour light schedule? like say 36 on 12 off? just curious if anyone has tried alternate schedules and what effects it might of had.

    kophey Member

    or maybe someone has done 4 on 1 off? i'm honestly curious if people have tried alternative lighting schedules and what if any the effects were.

    smppro Well-Known Member

    The results of messing with the lighting schedule when flowering is a hermaphrodite.

    smokealotapot420 Member

    I think it would just grow alot more, the hotter the plant is the more water it needs. If it get nutes from it water it'll be huge. :weed:

    smppro Well-Known Member

    Nope sorry you will just have 1 screwed up plant.:leaf:

    kophey Member

    do you say this because you have tried or have some evidence to back it up? or do you say this because you think thats what the case will be?

    smppro Well-Known Member

    Well its common sense that interrupting the flowering cycle will stress the plant which leads to herming. The plant will be going in and out of flowering, i cant imagine a worse thing for a plant. It like seeing what happens if you throw your car into reverse while driving forward.

    lyric420 Member

    Yes I would haft to agree! I tried different hours like that and they either get tall and shrink, no leaves and die after a while. Best to keep 24hrs or 18/6 at first then 12/12
    Rusty Crutch

    Rusty Crutch Well-Known Member

    I was told that plants release toxins at night and needed at least a couple of hours dark per day. I've tried it myself and haven't really seen a difference. Next grow I'll use two veg boxes and see if there is a difference.

    smppro Well-Known Member

    Ok apparently i was wrong, there is thread with a guy flowering with 36/12 without ant problems. So i guess it is possible to use 36/12 for flowering but it hasnt been proven to be anymore productive yet.:leaf:

    smppro Well-Known Member

    Never heard of plants releasing toxins at night, they release co2.

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