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Thread: Strange dark spots on leaves

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    Default Strange dark spots on leaves

    I noticed this problem just under a week ago now which looks like small brown spots on some of my leaves. There is no pattern to it so it would show up on the upper and bottom leaves(not in large numbers)
    I have been looking up pictures of what it could be and i'm still stumped because this looks different still. Any help on this would be amazing! i'm still a noob

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    How old are you plants, what lighting you using, what medium are you growing in, what nutrients are you using?

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    Quote Originally Posted by Ben.g View Post
    How old are you plants, what lighting you using, what medium are you growing in, what nutrients are you using?
    These are purple haze auto flowers at about 35 days old now running under a 300w meizhi led potted in john innes all purpose compost and im currently feeding them biobiz topmax and bloom 2ml,4ml per 2L of ph balanced water once every 3 days.

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    Quote Originally Posted by Acorn View Post
    These are purple haze auto flowers at about 35 days old now running under a 300w meizhi led potted in john innes all purpose compost and im currently feeding them biobiz topmax and bloom 2ml,4ml per 2L of ph balanced water once every 3 days.
    I'd wait for a second opinion mate as I don't want to ruin your plant as it could be something else.

    But it could be the start of a calcium deficiency.

    But I'm prepared to be over ruled on that.

    Have you got any cal/mag anyway?

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    Quote Originally Posted by Ben.g View Post
    I'd wait for a second opinion mate as I don't want to ruin your plant as it could be something else.

    But it could be the start of a calcium deficiency.

    But I'm prepared to be over ruled on that.

    Have you got any cal/mag anyway?
    I haven't got any of that but i was looking at symptoms of that and apparently if its calcium deficiency the veins of the leaf start turning yellow... I could be wrong tho lol

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    Quote Originally Posted by Acorn View Post
    I haven't got any of that but i was looking at symptoms of that and apparently if its calcium deficiency the veins of the leaf start turning yellow... I could be wrong tho lol
    Yeah maybe not cal, was just looking at your nutes feeding

    Are you feeding every time you water?

    The spots could be from over feeding or nute lockout.

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    Quote Originally Posted by Ben.g View Post
    Yeah maybe not cal, was just looking at your nutes feeding

    Are you feeding every time you water?

    The spots could be from over feeding or nute lockout.
    They are fed once every 3 days on quite a low mix of organic nutes

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    Could you post pics of the whole plant? That'll give everyone a better idea, mate.

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    Default Strange dark spots on leaves

    Quote Originally Posted by Acorn View Post
    They are fed once every 3 days on quite a low mix of organic nutes
    Might still be over feeding a bit there mate. You dont want to put food in with every watering. If there is too much potassium, it’ll lock out other nuits like cal mag n shit. You probably don’t have a deficiency, more a lock out. Feed just water for the next couple of feeds and it should clear up



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    What ^^^^ he said, exact same thing on my first grow, overfeeding was the issue. Bit of plain 6.5 PH'd water (yeah I know, not in soil...) for a few days did the trick

    Was actually Macky's advice then too

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    Quote Originally Posted by AND View Post
    What ^^^^ he said, exact same thing on my first grow, overfeeding was the issue. Bit of plain 6.5 PH'd water (yeah I know, not in soil...) for a few days did the trick

    Was actually Macky's advice then too
    Recycled knowledge man, gotta pass that shit around lol


    Read the plant, not the instructions on the bottle.

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    Quote Originally Posted by Macky View Post
    Recycled knowledge man, gotta pass that shit around lol


    Read the plant, not the instructions on the bottle.
    Said it before, knowledge is meant to be shared as is Cannabis

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    Cheers for the help ill hold off for feeding for now... I forgot to mention I even got these spots when I used a low mix of nutes like 1ml per 2l

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    Quote Originally Posted by Acorn View Post
    Cheers for the help ill hold off for feeding for now... I forgot to mention I even got these spots when I used a low mix of nutes like 1ml per 2l
    But still. The plants are young, the soil is fresh, and there is enough food in it to last for a few weeks before the plants starts to suffer. You’ve just added food too soon, and a bit too much, that’s all mate.


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