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brown spots on leaves?

Discussion in 'Marijuana Plant Problems' started by Jdubs, Apr 11, 2010.

  1.  
    Jdubs

    Jdubs Member

    I have a month and a half old plant that is showing brown spots on the first couple sets of big leaves. You can see the spots in the picture I posted with this thread. Any idea what it is? Remedy? THANKS
     
  2.  
    indipow82

    indipow82 Well-Known Member

    Looks like the start of mag def...
     
  3.  
    rzza

    rzza Well-Known Member

    out of 20 girls i just found a leaf that looks just like that. its just one leaf on one plant. i add cal mag with their feeding so i doubt thats it.
     
  4.  
    Jdubs

    Jdubs Member

    the spots are located on a number of leaves in my case. only on the lower leaves though.
     
  5.  
    stonesour

    stonesour Well-Known Member

    This just happened to mine, it was caused by a build up of nutes effecting the ph. Do a good flush with ph'ed water of 6.5 and start over with half nutes after 4-5 days. thats what im doing now. good luck.
     
  6.  
    researchkitty

    researchkitty Well-Known Member

    With the spots where they are, either flush or magnesium generally. Seems like you wouldnt be nutrient burning your plants though at only 6 weeks old, though. Whats your ppm and grow environment like?
     

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