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Cal-Mag deficiency? Leaves yellow with brown spots in soil, please confirm

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    Cal-Mag deficiency? Leaves yellow with brown spots in soil, please confirm

    Hey guys, it looks like my plant has a magnesium and calcium deficiency, but I would like to get some input before I go to my grow shop to get new nutes. I attached a picture.

    Here's some data:

    -Auto Jack from Paradise Seeds 5 weeks old
    -flowering for a week now
    -noticed the yellow leaves today
    -Soil: Plagron Grow-Mix with perlite
    -18/0 light schedule with a MarsHydro reflector 46
    -Nutes: Plagron Bloom 2.5 ML per liter once a week
    Plagron Roots 0.5 ML per liter once a week
    Humidity: ranging from 45% to 70% just after watering (this goes down quick though)

    I don't think it's light burn because the LED (100 true watts) is away far enough. Also, since I live in Europe, can anyone recommend some nutrients to use? It seems that Advanced Nutrients Sensi Cal-mag Xtra is something I should buy, but it seems to have alot of nitrogen. I attached the ingredients for the Cal-Mag here. I don't want to use dolomite lime, since I can't remix the soil anymore.

    Also of note could be that I castrated her a couple of times, she was showing pollen sacks (not nanners). That seems to be resolved though, no more new pollen sacks for 2 days.

    Questions:
    -Do you think it's a cal-mag deficiency?
    -Is Sensi Cal-Mag suitable for soil during flowering because of the high nitrogen content?

    Thank you very much for your input!

    Penny
    Last edited by Penny21; 04-12-2017, 12:12 PM.

    #2
    Im not the one to answer this.. but I will say they are going to ask you what your PH is going in and PH is coming out
    Current Grows:

    GSC and SWEET TOOTH (flowering)

    Platinum LED P600 x 2 (380 w draw at the wall each)
    4'x4'x7' grow tent
    General Organics Go Box
    ProMix HP
    1>3>7 gal smartpots
    Well water PH 6.38

    SOUR BUBBLE, SOUR STRAWBERRY, LIFESAVER, GHOST OG x LEMON, BUBBA KUSH in veg

    Comment


      #3
      Sorry to hear about the pollen sacks hopefully no more pop up.
      Current Grows:

      GSC and SWEET TOOTH (flowering)

      Platinum LED P600 x 2 (380 w draw at the wall each)
      4'x4'x7' grow tent
      General Organics Go Box
      ProMix HP
      1>3>7 gal smartpots
      Well water PH 6.38

      SOUR BUBBLE, SOUR STRAWBERRY, LIFESAVER, GHOST OG x LEMON, BUBBA KUSH in veg

      Comment


        #4
        Purple stems tips and stripes i would say yes to cal mag

        Comment


          #5
          Right, I forgot to add that PH after adding nutes is tuned down to 6.5, drain is 6.9

          Comment


          • GDTRFB95
            GDTRFB95 commented
            Editing a comment
            That sounds alittle high to me. I think calcium uptake is ok but mag iron copper maybe couple others get locked out if the soil is over 7

          #6
          Learn how to easily adjust pH up and down if needed for your cannabis grow. It helps prevent nutrient deficiencies!
          Current Grows:

          GSC and SWEET TOOTH (flowering)

          Platinum LED P600 x 2 (380 w draw at the wall each)
          4'x4'x7' grow tent
          General Organics Go Box
          ProMix HP
          1>3>7 gal smartpots
          Well water PH 6.38

          SOUR BUBBLE, SOUR STRAWBERRY, LIFESAVER, GHOST OG x LEMON, BUBBA KUSH in veg

          Comment

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