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Thread: Maybe a deficiency? Brown spots on leaves.

  1. #1

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    Default Maybe a deficiency? Brown spots on leaves.

    Evening thc!!
    I got back from a little vacation and after tending to the plants I noticed that one of them got brown spots over 2 of the leaves and are also yellowing?
    Could his be a magnesium deficiency?
    Or am I completely off the mark?

    Any help would be greatly appreciated


    This is the full plant



    Thanks again lads


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    ladymaryjane (22-02-18)

  3. #2

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    Hello mate, need some more info to say what is wrong, such as what you are growing in, ph and ec levels etc...

  4. #3
    Macky Guest

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    Deficient of something for sure lol! Coco and perlite mix? What ph you running mate? You making sure you get run off with every feed? Give us more info man, tell us what you've got goin on here.

    First off, I'd say, a flush with just ph'd water, a good flooding, you have coco and perlite so good drainage. Once run off has finished, give them a half strength feed and obviously, ph that too. It should start looking up after that.


    Tbf, it's all speculation with out more info


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    Quote Originally Posted by ladymaryjane View Post
    Hello mate, need some more info to say what is wrong, such as what you are growing in, ph and ec levels etc...
    Sorry growing in plant magic soil.
    I try to keep my ph around 7.
    I don’t measure ec as I don’t have a pen.

    Until Saturday they’d only been fed water with rhizotonic. Then on Saturday which was the start of week 4 I started using canna terra vega, starting at quarter strength, feeding them 2 litres each of water.

    Then I went away until Tuesday which was when I noticed the spots.
    It’s only happening on 1 of the 5 plants which also happens to be biggest.

    Thanks again for all the help.


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    Hello again mate, unfortunately I am not a soil grower, (I do coco or hydro) so I cannot advise you.

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    Quote Originally Posted by ladymaryjane View Post
    Hello again mate, unfortunately I am not a soil grower, (I do coco) so I cannot advise you.
    Thanks for your time anyway.


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  10. #7

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    Looks like lack of everything mate. Give it 3 ml per ltr of Vega. 😉

    Sent from, Thames Iron Works.

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    Quote Originally Posted by ironman View Post
    Looks like lack of everything mate. Give it 3 ml per ltr of Vega. 😉

    Sent from, Thames Iron Works.
    Okay I gave them a watering yesterday so I’ll see how they are tomorrow and if they need it I’ll up the feed.
    Do you think I should mix a separate feed for the effected plant and keep the others on the same if they look okay?

    Thanks for the help.


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  12. #9

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    Whenever I get a deficiency like that, I figure that the others arent too far behind so I hit everyone with the ammendment. Again this probably isnt recommened but never steared me wrong.
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    SCROG and LST 3 plants COMPLETE 10.5 OZ'S

    https://www.thctalk.com/cannabis-foru...d-Extravagonja

    Check out the single mainlined Nitro Lemon Haze mentored by the mad scientist Dexter. COMPLETE 5.5 OZ's

    https://www.thctalk.com/cannabis-foru...lp-From-Dexter

  13. #10

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    I have this exact same problem. Either they are underfed or there is most likely a problem with the pH. I have no idea which one

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