Grow Room Height Problem

Discussion in 'Marijuana Growing Techniques' started by nicknack, May 8, 2008.

  1. nicknack

    nicknack Member

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    Tonight my plants will start their 12/12. However, their height is about 50cm from my 250w bulb.
    I don't think it would be good for them get any closer, so what extra height would you expect in the 12/12 period? These are a sativa.

    Cheers.
     
    nicknack, May 8, 2008
    #1
  3. BudBill

    BudBill Dark Helmet

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    A sativa can double in height. You can have them pretty close to a 250w. Using the back of your hand a guage try ~ 25 cm (10 inches). You hand should get warm but not real hot. Good airflow will help greatly.

    The lumens diminish by the square of the distance so the closer the better.
     
    BudBill, May 8, 2008
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  5. nicknack

    nicknack Member

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    Always the bearer of good news BB. I have a 10" fan running over the top so will have a good flow... lets hope they don't grow double though!
     
    nicknack, May 8, 2008
    #3
  7. BudBill

    BudBill Dark Helmet

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    Excellent my man! Keep an eye on the temps and you can always bend and tie the tops down :)
     
    BudBill, May 8, 2008
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  9. harvester

    harvester Member

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    A sativa can triple in height.
     
    harvester, May 10, 2008
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