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Guide for Diagnosing Plant Problems

Discussion in 'Marijuana Plant Problems' started by shenagen, Dec 13, 2007.

  1.  
    Samno

    Samno Active Member

    Needed some help diagnosing my one lady, mid level leaves are starting to show signs of spotting, my ph is perfect at a constant 6.5, environment is 25℃/50-60% humidity with the light on and 21℃/50% humidity with the light off, the only thing I did 2 days ago was change the brand of nutrients, could this be the cause? IMG-20160524-WA0015.jpg IMG-20160524-WA0016.jpg
     
  2.  
    blink6d99

    blink6d99 Member

    Yes by changing the nutrients it could cause thebplant some stress I would suggest smaller levels of nutrients until the plant tell you to increase levels
     
  3.  
    Samno

    Samno Active Member

    Did just that and now she is healthy again, thanks
     
    blink6d99 likes this.
  4.  
    blink6d99

    blink6d99 Member

    Yea no problem anytime
     
  5.  
    blink6d99

    blink6d99 Member

    Update
     

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  6.  
    Nuub

    Nuub New Member

    I dont know whats wrong with mine but my leaves are all weirded out and everything like ones growin towards the sun and the others are twisted heck one grew round and stopped i got it potted in a jack in the box large cup with some happy frog and some clay pellets in there just to keep everything airated and once a week ill mix a teaspoon of liquid guano with some bottled water up in a bowl and pour half. Damn reading this i already know im gonna get grilled but heck 1st time doing it i just wanted to gir r dun.
     

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  7.  
    blink6d99

    blink6d99 Member

    Over watering it looks like to me... Do u have drainage holes in the bottom of your cup ... If you do stop watering so much .. the less you do the better when they're that little


     
  8.  
    Str8bk

    Str8bk Member

    image.jpeg image.jpeg Can anybody tell me if this girl will last till harvest? She'll be at day 55 on the 20th but leaves are rapidly turning yellow.
     
  9.  
    Nuub

    Nuub New Member

    Wow thank you totally made a difference shes already growing normalish
     

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  10.  
    Nugs808

    Nugs808 Member

    Hello fellow farmers, I have this problem with my outdoor grow. I'm getting stem rot where the branch comes off the main stalk. Anyone know what this is? Genetics from AMS and its called Kryptonite. Suppose to b high in thc and cbd
     

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  11.  
    slownickel

    slownickel Well-Known Member

    Nugs, probably a calcium deficiency from early on, where you knocked off a growth point and it never healed. Everything and anything probably climbed in afterwards. Take a close look. See if it is on the top, bottom or middle where the rot is. I bet it is on top, right where that wound was made.
     
  12.  
    slownickel

    slownickel Well-Known Member

    Could also be a boron problem, low B blocks Ca uptake. As does high K and Mg and too much water.
     
  13.  
    Nugs808

    Nugs808 Member

    Thanks for the input Slown, yea I don't think I put enough dolomite lime in my supersoil. I'll b supplementing w calmag next grow. I'm Being that I'm in Hawaii
     
  14.  
    Nugs808

    Nugs808 Member

    Humidity is bad here in Hawaii. Mold and fungus are serious issues. It could also be borer bug. Nugs are looking good!
     

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  15.  
    Carver1

    Carver1 Member

  16.  
    Hawaiimedman

    Hawaiimedman Member

    I've been having this problem growing in Hawaii for 3 seasons. Some kind of black spots come on the stalks then branch will turn yellow then brown then die while the rest of the plant is still healthy looking .also some leaves have yellow and brown spots...i use rainwater and pH seems fine I grow in a big greenhouse with open sides plenty air flow... I live in a jungle it's 85° and humid... I've tried watering azamax into soil....I've tried spraying azamax...sipnosad...serenade ....nuke em...safer powdery mildew cure... even tried avid but nothing seems to stop it...lmk if anyone knows the cure or recognizes these problems..mahalos
     

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  17.  
    Hawaiimedman

    Hawaiimedman Member

    I'm in Hawaii also looks like I got the same problem look at my pics....lmk if u have any luck with anything... mahalo
     
  18.  
    Hawaiimedman

    Hawaiimedman Member

     

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  19.  
    mark rubino

    mark rubino Member

    Any ideas on what this could be? I've read it all but having problems diagnosing... First indoor grow. I'm in the second week of veg, running 2ml h2o2, 3ml of calimag, 4ml micro, 5ml grow, 1ml bloom, 2.5ml roots excel, and 5ml diamond nectar in a drain to waste. Flushing now with a light foliar or seaweed extract to see if I'm overloading them. R/o sys with ppms of 600 on a 500scale. Anything will help! Thanks
     

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  20.  
    Nugs808

    Nugs808 Member

    another grower said to try using sulfer powder mixed with some latex paint and spot treat
     

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