Brown spots on leafs and drying out

Discussion in 'Marijuana Plant Problems' started by fotoid, May 15, 2018.

  1.  
    fotoid

    fotoid Member

    fotoidMember
    The leafs on 2 out of 5 plants have brown spots and curling up. Pictures aren't the greatest. Using ocean forest soil. 1,000 whatt hps bulb in a 5x5 tent. Any ideas?

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  2.  
    tiltswitch

    tiltswitch Well-Known Member

    Ph problem probably, could be mag def. could be a million things without you telling us what your doing to your plants exactly, temps, light, feed,ph, etc etc
     
    Beachwalker likes this.
  3.  
    fotoid

    fotoid Member

    Ok. The temp runs about 75 to 85 degree. I use ocean forest soil bubba grow nutrients about once every other week. I use tap water 7ph let it sit about a week before watering. I use a 1,000 watt hps bulb. I have 5 plants in my tent but only effecting 2 of the 5. Growing white witch. Plenty of fresh air. They have another 2 or 3 weeks if grow to go. Buds look fine just all the leafs are turning brown and drying up. Thanks for any input.
     
  4.  
    Beachwalker

    Beachwalker Well-Known Member

    You're starving your plants, and your pH is too high, therefore what little nutrients that would be available for uptake is not readily available to them. (Also want to know your humidity levels)

    *Feed balance nutrients more often, buy pH meter

    Also letting your water sit is a lot less important than adjusting your pH properly.

    You need to read more for best results, check out ilgm or grow weed easy websites
    -good luck!
     
    tiltswitch likes this.
  5.  
    fotoid

    fotoid Member

    Thanks a bunch. Will buy a better ph meter and drop the ph to about 5.5. Hope that'll work. Is it too late for the plants I have growing now?
     
  6.  
    Beachwalker

    Beachwalker Well-Known Member

    6.5 in soil for best results

    Damaged leaves don't come back but make a change and save what you have, if I were you I would flush immediately with 6.5 pH water followed up by a proper feeding at full strength (calibrate new meter properly!)

    and I would always feed at full strength every feeding. once every few weeks do a light flush with 6.5 plain pHed water. I flush maybe twice, three times depending on how long they flower so about once a month, but that's just how I do it

    If you lose too many leaves you're not going to get best results.

    Also need humidity meter ( $8 ) to rule out any type of fungus ? When I had septoria I had worse looking plants believe me, that's why I want you to begin to monitor your humidity, you need to keep it below 60% in flowering at all times for best results
     
    Last edited: May 16, 2018
    tiltswitch likes this.
  7.  
    tiltswitch

    tiltswitch Well-Known Member

    Good info there.
     
  8.  
    fotoid

    fotoid Member

    After flushing plants with 6.5 ph I tested the runoff and it was 5.5. Only 2 of my 5 plants have the tips of the leaves turning brown and drying up. Anyone have thoughts on the reason?
     

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