Dark patches on leaves

Discussion in 'Marijuana Plant Problems' started by oill, May 9, 2018.

  1.  
    oill

    oill Well-Known Member

    Hi yall,

    Hat a hot patch where room hasgotuo to 35c for a few days. in rockwool. Think this is a heat derived issue.

    PH is 5.7

    So this might be heat... Anyone else got any ideas? What steps shoukd I take?
     

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    moondance likes this.
  2.  
    JSB99

    JSB99 Well-Known Member

    It looks more like either nitrgen deficiency or heat stress. Did you have your light too close to the tops?

    When leaves start showing issues from the bottom up, it's some sort of deficiency. When it's from the top down, it's either light or heat stress. Your new growth looks good, so just make the the upper leaves don't start showing the same thing. Bad leaves won't recover, so don't worry about them. You can trim them off.
     
  3.  
    JSB99

    JSB99 Well-Known Member

    BTW, she'll recover just fine. Don't think that you wrecked this plant. As long as there's a hint of green with one of these hardy plants, they can be recovered.
     
    tiltswitch likes this.
  4.  
    oill

    oill Well-Known Member

    Lights are about 18 inches away and they are on low. The room temps were getting up to 35c, so that was an issue. I have gone a water flush and will need to start feeding again soon
     
    JSB99 likes this.
  5.  
    oill

    oill Well-Known Member

    I have also given the table more angle. I think there has been a bit of water sitting that doesn't help. Should have stuck with coco. Hoping I start to et the hang of this stuff
     
    JSB99 likes this.
  6.  
    oill

    oill Well-Known Member

    Looking better now. Think there were a few issues...
    1 not enough tilt to drain
    2 it was way too hot
    3 maybe a lil pH flux

    Looking better after flush and refeed a few days later. Now ramping it back up to an ec of 1.4. Is that too high?
     

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