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phosphorus deficiency?

Discussion in 'Marijuana Plant Problems' started by white_rUsSO, Jan 11, 2018 at 6:29 PM.

  1.  
    white_rUsSO

    white_rUsSO New Member

    Hello folks,

    Reaching out for help hoping I can identify the issue with one of my plants. Growing in rockwool ebb and flow. 1 of my 3 plants is showing signs of, what I think is, nutrient deficiency. Top leaves show discoloration where inside the fan leave is a lighter green and outside is dark. Seeing some red / brown rust spots in the middle of the blades and some of them are curling in. Also noticing the tops of petiole's are purple. From what I've been reading I believe this to either be a calcium or phosphorus issue, possibly due to salt build up? Any advise is greatly appreciated
     

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  2.  
    dtl420

    dtl420 Well-Known Member

    Can you snap a picture without the led on? It's hard to see much of anything in that color lighting.
     
    Howard Burn likes this.
  3.  
    white_rUsSO

    white_rUsSO New Member

    Yea for sure
     

    Attached Files:

  4.  
    dtl420

    dtl420 Well-Known Member

    How high is your light, and what is you're pH? Also what nutrients are you using?
     

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