Yellow spots on leaves. Need help

Discussion in 'Marijuana Plant Problems' started by buzzinga, Mar 8, 2018.

  1.  
    buzzinga

    buzzinga Member

    Hey guys, i am a newbie and am having problems figuring out the problem with my leaves. alot of yellow spots on the leaves and some leaves even have burnt tips. The plant looks healthy overall but the yellowing is really disturbing. I did some research and am guessing either a ph or cal mag problem. I would really love to know what you guys think. Any help would really be appreciated. Thank you. IMG_6307.JPG
     

    Attached Files:

    Tim1987 likes this.
  2.  
    Tiffj

    Tiffj Well-Known Member

    What is your ph? Don’t think it’s a cal or mag problem, it actually looks healthy, has it got worse or not? Or seem to be getting worse? Either way carry on doing what your doing, could just be related to temp or something minor.
     
    Last edited: Mar 9, 2018
  3.  
    drsaltzman

    drsaltzman Well-Known Member

    They look good.
    I've had the same spots. Never ruined a crop. Never spread.
    Could never pin it down either, but suspected nute water drops heating up in the light.
    More physical than systemic.
    You notice any bugs in your soil?
     
  4.  
    projectinfo

    projectinfo Well-Known Member

    Did you spill nutrients on your leaves.
     
  5.  
    drsaltzman

    drsaltzman Well-Known Member

    Sometimes.
    Especially watering them when they're younger, shorter.
    Not straight nutes. Or foliar feeding.
    Water with nutes in it. Sometimes heat and water can damage the leaf.
     
    projectinfo likes this.
  6.  
    Tim1987

    Tim1987 Well-Known Member

    I usually get this if my ph, ec/ppm's are high.
    You're only just locking out.
    What medium?
    Ph? Adjust
    Ec/ppm? Adjust
    Good luck
    Tim.
     
  7.  
    ANC

    ANC Well-Known Member

    Nutrient problems usualy display symmetrical marks, like an ink blotch folded in a piece of paper then opened again.
    This does not seem to fall in that group.

    I'd go with mechanical or insect injury.
     
    Quani and projectinfo like this.
  8.  
    Tim1987

    Tim1987 Well-Known Member

    Check ph. Adjust
    Check ec/ppm. Adjust
    Always!
    Before anything!
    Go from there.
    Good luck.
    Tim.
     
  9.  
    drsaltzman

    drsaltzman Well-Known Member

    IMG_20180309_211308.jpg

    Bottom right.
    Current grow.
    Physical.
    Not systemic.
     
  10.  
    projectinfo

    projectinfo Well-Known Member

    Yes I'd say you spilled some of your feed on your leaf.

    Foliar feed is usually 1/3 or 1/2 strength. I think, correct me if I'm wrong.

    I've seen this a few times, when I'm sloppy trying to feed 18 plants and spill some
     
  11.  
    ThatCrispyKid

    ThatCrispyKid Member

    I' having a similar issue only my girl has dots all over.. 170w cfl, ffof soil, no nutes yet.. water with brita filtered tap ph at6.5 any suggestions? The girl right next to it looks perfect.
     

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  12.  
    Tim1987

    Tim1987 Well-Known Member

    Just do the same.
    Probably 80-90% of ALL growers' problems is due to overfeeding
    Id bet my life on it!!
    Follow the steps.
    Peace
    Tim
     
    ThatCrispyKid likes this.
  13.  
    ThatCrispyKid

    ThatCrispyKid Member

    Thank you.. good deal that's all I wanted to hear is that it's most likely not a disease that' gonna effect my other girls lol
     
    Tim1987 likes this.
  14.  
    Tim1987

    Tim1987 Well-Known Member

    Keep the pots seperate aswell.
    Dont let them all sit in each others runoff. Give them their own waste pan. Itll prevent rot from spreading, if there ever is.
    Your plants are still seedlings too. Be gentle.
    Adjust it all slowly. Over the next week or so.
    Give it a little flush. Check readings
    Wait a couple days for it to dry. Flush. Check again
    Etc, etc.
    Until you have it stable.
    It doest look too bad.
    Good luck
    Tim
     
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  15.  
    ThatCrispyKid

    ThatCrispyKid Member

    Will do, thank you
     
    Tim1987 likes this.
  16.  
    Tim1987

    Tim1987 Well-Known Member

    Welcome brotha
    You're pretty in check.
    Good luck. Healthy gro.
    Tim
     
    ThatCrispyKid likes this.
  17.  
    Beachwalker

    Beachwalker Well-Known Member

    I have those same marks on one or two lower leafs on 1 of 2 unknown freebies of GG, the new growth doesn't seem to have them, transplanting in about a half an hour, will grab a picture then
    -good luck!
     

    Attached Files:

    ThatCrispyKid likes this.
  18.  
    buzzinga

    buzzinga Member

    Hey, guys thank you all so much for taking out time and helping me out. Back with an update. The problem seems to spread and some of the new leaves have been affected as well. Leaves are becoming darker and feel kinda crisp, brittle, paper-like. Some new leaf tips are coming out curled.
    Ph is 6.8/ ppm is 350
    Medium is a soilless mix
    Using 800w leds/ 32 inches from plant
    Advance nutrients 3 part oh perfect Grow,Micro,Bloom and cal-mag plus

    Attached some pictures.

    Thank you, Really appreciate the help, Cheers :)


    IMG_6497.JPG
     

    Attached Files:

  19.  
    Beachwalker

    Beachwalker Well-Known Member

    Do you mean 5.8?
     
  20.  
    Tim1987

    Tim1987 Well-Known Member

    You have to cut your PPM!
    Make sure your runoff is 5.8 or so
    Cut any calmag now! Calcium is causing this.
    Feed at 200ppm or so, and 5.8.Ph. Flush it through!
    MAKE SURE YOUR RUNOFF READS THE SAME!
    Let us all know soon.
     

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