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Deficiency mid flower

Discussion in 'Marijuana Plant Problems' started by Symphonyofdreams, Aug 13, 2017 at 12:28 AM.

  1.  
    Symphonyofdreams

    Symphonyofdreams Member

    Day 38 flower
    Strain: gorilla glue 4
    Medium: soilless peat based mix
    Pots: 5 gallon
    Nutrients: GH flora serries ph'ed 5.9-6.1
    950 PPMs
    Water: RO with cal mag added watered EOD
    Room temp: 74
    Co2 1100 ppms
    Lights: CMH at proper distance

    Im having the same issue pop up during flower over and over. This particular run is the same issue but much more severe. Leaf health is always absolutely perfect for veg and first 2 weeks of flower. Then about 2 and a half in it starts happening and progressively gets worse. on previous runs I thought I was overfeeding PK so I eliminated the liquid kool bloom. Basically following the 3 part recommended feed chart minus the kool bloom. But now I'm thinking I have a bad phosphorous deficienty all along and now worse. Also looks like a magnesium deficiency but wouldn't make sense because I'm adding cal mag and it's it's in the florabloom What do you guys think?
     

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    Last edited: Aug 13, 2017 at 1:47 AM
    OldMedUser likes this.
  2.  
    nxsov180db

    nxsov180db Well-Known Member

    What ml/gallon are you feeding of each GH flora series? I used to have a similar problem until I learned how to feed in the correct ratios...
     
  3.  
    cookie master

    cookie master Well-Known Member

    whats the runoff? id say over ferting and its so overferted its locked. Its different than ive seen with its blotchiness.
     
    jacrispy likes this.
  4.  
    Symphonyofdreams

    Symphonyofdreams Member

    I'm following the recommended drain to waste chart exactly. Minus no liquid kool bloom.
     

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    OldMedUser likes this.
  5.  
    Symphonyofdreams

    Symphonyofdreams Member

    I'm not sure the runoff. I'll give it a check this next water.
     
  6.  
    jacrispy

    jacrispy Well-Known Member

    i locked out a plant once & it looked alot like this.
    i mixed raw k2s04 & cal-mag to lock mine out.
    not sure what you're doing wrong, but it looks similar.
     
  7.  
    Los Reefersaurus

    Los Reefersaurus Well-Known Member

    The damage is done, so just limp it in. Don't do anything too drastic try your next run with a slightly higher ph try 6.3-6.5. Clean and re-calibrate your ph meter. Looks like looks like lock out and stunted roots to me.
     
  8.  
    Symphonyofdreams

    Symphonyofdreams Member

    Assuming it is lockout im more concerned about how to avoid this issue in the future. I'm following the drain to waste protocol exactly(Minus liquid kool bloom. Im extremely detailed on ph, Never one feeding where things arnt spot on. And not adding in other npk or cal mag supplements in from other companies. So I'm kinda stumped on this.
     
    OldMedUser likes this.
  9.  
    nxsov180db

    nxsov180db Well-Known Member

    Don't use that feed chart again. You're ratios are way out of wack. The problem began in week 2 you said right? You were feeding 4ml micro, 1ml grow, and 5ml bloom, this is where that puts you:
    N 58
    P 30
    K 66
    Mg 21
    Ca 53
    Your Ca should be between 2/3-1/2 of the K and MG should be about 1/2 of the Ca. Which is probably why they have you adding in the koolbloom to bring the K up where it has to be but it probably brings it up to high. What your feeding now is fine for the end of flower (4ml micro, 8ml bloom). Next time just continue your veg mix through week 2 then week 3 do a 3-2-1 ratio of bloom:micro:grow. Last 2 weeks eliminate the grow and do a 2:1 ratio of bloom:micro with about 2/3 to 1/2 the EC you used during flower.
     
  10.  
    Mohican

    Mohican Well-Known Member

    I have stopped using cal/mag and I now use Epsom for the Mag and Sulfur. They don't need so much calcium. They are not tomatoes.
     
    jacrispy likes this.
  11.  
    OldMedUser

    OldMedUser Well-Known Member

    That's toxic salts buildup. I've been having a problem with it for years due to really low humidity so will be lowering the ppm drastically. Been blaming it on too much N in later flower but pretty certain it's the 20 - 30% RH we have most of the year. Even now in the heat of summer the grow room hasn't got over 60% @75F.

    Cut your ppm way down but it will likely progress regardless.

    Good luck.
     

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