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... I think it’s Calcium deficiency??? (newb)

Discussion in 'Marijuana Plant Problems' started by Akira90, Dec 1, 2017.

  1.  
    Akira90

    Akira90 Member

    Hello everyone. I have a few plants in diff stages. This one is almost coming out of veg and switching to flower. I noticed it looks a little weird. Any feedback would be great. On a side note I did just put these under a pretty bright led light putting down 800-900 micro moles on my par meter. I’m wondering if it’s light shock...? It’s drooping as my lights had just turned off from my 18/6 and I pulled it out to take a picture.
    28EFDAE3-2667-4FC0-8C76-B9AD99A2A0A6.jpeg

    This ladies in week 5 of flower. Not sure if it’s calcium but that’s what I’m leaning towards as Im feeding around 5.6-5.8 Ph and using RO. Guessing I need to use mag cal not just Mag and let it go above 6.2 to uptake calcium. I figured the GH Cocotek had enough calcium to offset the 1/4 tablespoon per gallon of magnesium (epsom salt) I’m adding as I’m growing in Rockwool. Looks like I was wrong :(
    46F8A156-6F1B-4E32-BE86-F83B767D5F6B.jpeg

    This guys in week 5 of flower also. I’m pretty sure it’s calcium?
    404B41FA-6408-4D7E-87FA-BEEE3B05820F.jpeg

    Any help and feedback would be greatly appreciated.

    Thanks in advance everyone :)
     
    Last edited: Dec 1, 2017
  2.  
    john wishmyer

    john wishmyer Active Member

    hows your watering schedule
     
  3.  
    Akira90

    Akira90 Member

    I've been feeding at lights on and after the rockwool seems to be drying out on the top but still a little moist towards the bottom.
     
  4.  
    Jypsy Dog

    Jypsy Dog Well-Known Member

    Akira90 likes this.
  5.  
    meetjoeblow

    meetjoeblow Well-Known Member

    Most nutrient lines short the cal/mag and sell it as a supplement. Its not even worth the head ache to skip buying it. I no you need cal/ mag, I think you should raise your ph to 6.1 ish, and I think you need more phosphorus. What's your ppm. Also you neevvvveeerrr want to go into flower with any type of issues. Once 12/12 starts, you're racing the clock
     
    dagwood45431 and Akira90 like this.
  6.  
    oh really???

    oh really??? Well-Known Member

    i agree DO NOT FLOWER YET. My knowledge says ph issues. Purple stems/yellowing leaves/necrosis. If you look at only one of the issues you could assume nitrogen deficiency, phosphorus deficiency, or cal-mag problems. It isnt a light issue. what questions do you have?
     
  7.  
    Akira90

    Akira90 Member

    Thank you very much guys. The first picture, I’m coming to the conclusion that it may have been over watered by my roommate while I was out of town for a week... I guess he thought it needed to be always wet. Could that have caused this?

    Still trying to figure out the plants in my flower tent. I guess those pictures of the leafs could have also been caused by him over watering?
     
  8.  
    oh really???

    oh really??? Well-Known Member

    drooping leaves could be overwater, but....all the other factors say lockout.
     
  9.  
    Akira90

    Akira90 Member

    Dang it. Should I do a flush and new res?
     
  10.  
    oh really???

    oh really??? Well-Known Member

    Change Rez. Flush with PhD water for a day or two. Then Change Rez and add nutes at 1/2 strength. Ph at 5.5. Your ph should raise and ppm/ec drops. Let me know how else I can help.
     
    meetjoeblow likes this.
  11.  
    oh really???

    oh really??? Well-Known Member

    wait did I miss something? are you doing hydro?
     
  12.  
    Akira90

    Akira90 Member

    Yes, hydro
     
  13.  
    oh really???

    oh really??? Well-Known Member

    Ok. Are you hand watering.
     
  14.  
    Akira90

    Akira90 Member

    I am now... I was trying to ebb and flow in a 4 by 4 tray but was letting it get too high and saturating for too long a few times a day ‍♂️
     
  15.  
    oh really???

    oh really??? Well-Known Member

    Do you have a timer?
     
  16.  
    meetjoeblow

    meetjoeblow Well-Known Member

    Wait I was unaware you were operating out of a full blown hydro set up. I thought they were suspended in a soil less media and you were hand watering. That kinda changes things. Over watering causes droopy leaves. But you shouldn't be able to no scratch that it's hard to over water in a hydro. Especially since rock wool drains so well. Do you mind taking a picture of your setup.?. And how long are you leaving the plants submerged? agree with oh really . you should flush to give yourself a clean slate. Nutrient deficiencies express themselves as various leaf and stem color changes. The fact that you have more than one normally means your ph is screwd and and the plants can't absorb what's in the soil but if that's not the case the plants could be under fed
     
    oh really??? likes this.
  17.  
    meetjoeblow

    meetjoeblow Well-Known Member

    *absorb what's in the solution
     
  18.  
    Akira90

    Akira90 Member

    Thank you very much everyone. I’ve been redoing my setup and hand watering to make sure the ladies dry out more and carefully watching the pH. They’re starting to look a little better after I did a flush but now I’m seeing this pop up.

    I want to say maybe potassium or is this just part of the magnesium issues? These are in the middle of the plant. Not new top growth. 6806FF77-C508-4132-846D-8C91CD413EAD.jpeg C3943E45-6915-45D7-8FEE-922840926E21.jpeg
     

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