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Thread: Dark Spots On Yellowing Cannabis Leaves. Need Help!

  1. #1

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    Default Dark Spots On Yellowing Cannabis Leaves. Need Help!

    hello people!
    I'm having a dark spotted some weird yellowing leaves situation on new growth(top parts of the plant) and can't really find out what causes it.
    I have two 45 days old plants from regular seedbag. they were in a grow room for 30 days and they've been replaced on outdoor about for 2 weeks now. they are getting sunlight at least 8-10 hours a day, temp. is around 80f. I am feeding them with general organics biothrive-grow by checking the final water ph is around 6,2-5. the only problem I've had with these plants was fungus gnats and it just disappeared after using neem oil for foliar and aptus soil attack for soil drench. I have noticed that dark spots right after using aptus soil attack insecticide. so did I probably damage the plant or what? in the second picture you can see yellowing on the leaves and as the yellowing parts spreads the dark spots comes shortly afterwards
    any help would be apperaciated. thanks in advance.
    peace
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    Last edited by blackwitchery; 27-05-18 at 02:15 PM.

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    GEORGE (27-05-18)

  3. #2

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    Double check your ph. I once had brown and yellow spots appear , it turned out it was from micro deficiency due to root lockdown, my ph dropped to 5.4 in rdwc and it was enough to do the damage. I added some calmag but it only helped when i got the of up to 6.0.

    More likely it is like you said chemical damage, in that case they should be fine. Doesn't seem like there is dangerous amounts of it.

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    blackwitchery (27-05-18), GEORGE (27-05-18)

  5. #3

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    I actually wasn't so sure that my ph pen reading it correct so I calibrated few weeks ago and I have test it to make sure. yeah it seems like it's because of the insecticide hope its not going further than that. at this point I think Im hoping for the plant heal itself by the time

  6. The Following 2 Users Say Thank You to blackwitchery For This Useful Post:

    bigW (08-06-18), GEORGE (27-05-18)

  7. #4

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    Yeah I am pretty sure it will get better. Just watch it closely

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    GEORGE (27-05-18)

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