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Slow growth in flower

Discussion in 'Marijuana Plant Problems' started by Stltoed, Sep 13, 2017.

  1.  
    Stltoed

    Stltoed Member

    Good afternoon. I have 4 plants in a 50 gallon RDWC system (1 Pineapple Chunk, 3 Ayahuasca Purple). I THINK I had a Nitrogen toxicity issue last week. Dark green leaves. Leaves were also clawing and cupping. I flushed the system and added nutrients at about 2/3rds of what they were. I only added 10 teaspoons of Nitrogen. I'm using the Gen. Hydro. Trio.

    My questions...

    How long does it normally take to get over Nitrogen toxicity?
    Could it be something else?
    Does anyone have advice for me?

    I grow in an insulated shed in my backyard. I use Black Dog lights. Room temp is usually 83 degrees during the day. Nutrients are never over 70. The room has AC, a humidifier, a dehumidifier, there are 4 fans, with an 8 inch exhaust fan that will easily change out the air in a few minutes.

    The plants look OK, but they basically stopped doing anything right in the middle of flower. I'm kinda running out of time. Any advice will be most appreciated.

    Cheers.

    T.
     

    Attached Files:

  2.  
    Bugeye

    Bugeye Well-Known Member

    Sort of a bad time to nuke a plant. No way that I know to get the yield back, short of revegging. Personally, I'd rather start over than reveg. Taking your nutes down is the correct action.
     
  3.  
    Stltoed

    Stltoed Member

    Wipeout. Not what I wanted to hear. I'm gonna keep at it i think.
     
    Bugeye likes this.
  4.  
    ruwtz

    ruwtz Well-Known Member

    Definitely N poisoning! The cupping, the dark green, the waxiness and stunted flower bloom all tell-tale signs.

    Did you change up your feed regimen for bloom to reduce N in favor of P and K? GH Trio still has N in flower, as it should, so you're currently continuing to add N. Excess ammoniacal nitrogen in particular will stunt flower growth and AFAIK this is the backbone of N in GH Trio.

    Looks in pretty bad shape for late flower dude. I'd be tempted to start over too.

    Dry salts gives you full articulation over individual macronutrients, thus making isolation of nitrogen real easy. Total control is one of many reasons you might want to consider dry ferts.
     
  5.  
    Stltoed

    Stltoed Member

    I never knew about the nitro in the bloom. Drat. I'll finish it out. Thanks for writing
     

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