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Thread: is this a potassium deficiency?? leaf problems..

  1. #1

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    Default is this a potassium deficiency?? leaf problems..

    Can anybody tell me what might be causing these problems??

    They are from my blue cheese that is growing in plagron batmix. Im feeding bio bizz nutes as per the flowering schedule on thc talk. The ph in my feed is always 6.5 and the ec is always less than 1.5ms/cm. Temps are between 55f-85f lights off/on but usually around 78f and humidity is around 50% or less and im growing under a 250w hps in a grow tent thats in my garage

    From looking at the plant abuse chart on thc talk it looks and sounds like a potassium deficiency? If so is it too much or too little and what should i try doing??

    Please shout up guys.. cheers
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  2. #2

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    Default

    id actually say it was a Nitrogen deficiency mainly, perhaps lacking little a Phosphorous too
    but also i think your low night-time temperatures is also causing a little nute lock within the plant, this can cause a little leaf tissue damage which can look like Phosphorous def, i think your gonna have to keep em warmer at night
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  3. #3

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    cheers dj. ive been concerned about night temps for a while and the fact that they are only going to get lower now so ive ordered a larger tube heater with thermostat for lights out so hopefully that will help

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    dj, ive managed to increase lights out temps to 65f-69f which im sure will help but the blue cheese is still showing these problems. it will be 6 weeks into flower on thurs. any ideas mate? or should i not worry too much?

    ps, my northern lights which will be 5 weeks into flower on thurs is showing next to no deficiencies at all but i know different strains react differently to conditions ect
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  5. #5

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    its Nitrogen (N) deficiency for sure and the plants are probably lacking in the other Major nutrients too by now, you can give them a half dose feed of a flowering formula fertilizer just too see them till they finish

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