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Thread: Magnesium Deficiency? Brown spots Interveinal chlorosis.

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    Default Magnesium Deficiency? Brown spots Interveinal chlorosis.

    Couple of small brown splotches and some interveinal chlorosis on the top of the plant.

    I believe I have a Magnesium issue here, looking for a confirmation/2nd opinion before I treat her please and thank you for your time



    Soil or hydro or coco: Coco

    Strain: Mephisto Genetics 4 Assed Monkey

    Photo or Auto: Auto

    plant age: 50 days from seed

    pot size: 5 gallon hempy

    has it been repotted? and when?: nope

    soil type: N/A

    nutes or additives used and how often for soil: N/A

    Air temps (max min):32/28

    Res temps (max min): N/A

    humidity: 45%

    lighting type and wattage (hps, led, cfl): 2 x LED HLG QB 260w dimmed @ 200w each

    Light schedule: 24/0

    ph level: 5.9

    EC (hydro and coco only) 1.3 (600ppm)

    Background EC. 0.4

    feed schedule and nutes (for hydro and coco) Greenleaf Nutrients Megacrop 3 grams per gallon daily to run off (20-30%)

    Any thing else: diary is in my sig for a full plant history if required




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    That's what I'd say, very early mag def nice catch. I was thinking about trying that megacrop but it's a least $125 for 20 lb over here.



    J


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    Quote Originally Posted by jingo View Post
    That's what I'd say, very early mag def nice catch. I was thinking about trying that megacrop but it's a least $125 for 20 lb over here.



    J

    Cheers Jingo, had some advice from Gardro in the diary about it being too high a Daily Light Integral being one of the root causes leading to the mag lockout.

    So going to back my lights off from 24/0 to 20/4 and dose up with calmag in the morning. I was planning to give em a dose when they finished stretching but didn't... typical


    Out of stock at the minute but they do 1kg bags at 75% off to try, theres a discount code on the product page. I guess its the taxes and shipping that push that cost up for you?

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    It's interesting how many odd deficiencies you can get from LEDs, gardro really knows his stuff.

    Yeah I guess all prices here are always quoted with shipping and pretty expensive stuff.



    J


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    Quote Originally Posted by jingo View Post
    It's interesting how many odd deficiencies you can get from LEDs, gardro really knows his stuff.

    Yeah I guess all prices here are always quoted with shipping and pretty expensive stuff.



    J

    Truth.

    Tackling the cause is Gardro’s game and is therefore always worth listening to.


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    I'd love to do it and you know you've always had it coming

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    Gave them a 4 hour lights off period last night, and a dose of calmag with their feed today, 1.5ml/L.

    They don't look to be any worse today, despite some 35 degree temps yesterday So will continue to monitor and keep you updated

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    Hi I wouldn't rule out nitrogen toxicity , leaves look a bit on the dark side this would also cause lock out as your experiencing at the mo, I've just had one of my plants with similar symptoms I flushed thoroughly (4 weeks into flower 'photo')then fed a nitrogen free diluted bloom feed , can't say this will sort your problem out but a week later my plant has recovered & is back on track

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