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Thread: Black spots + Yellow Leaves - help please

  1. #1

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    Default Black spots + Yellow Leaves - help please

    Hello guys,

    A few of my plants have leaves that aren't looking so well.

    About 3 weeks into flowering. Some of the leaves are becoming yellow with significant black spotting. The rest of the leaves appear to be pretty much unaffected.

    Last feed was with Canna Pk 13/14 at the weekend. Prior to that liquid seaweed.

    Appreciate any help/advice.






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  3. #2

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    Might be a problem with watering at wrong ph level. Look through this thread, looks the same. https://www.thctalk.com/cannabis-for...-problem/page2

    I flushed mine, ph'd the water with lemon juice to bring it down, and gave it fresh water, my tap water as standard is hard and was high ph, 7-9. PM nutes auto ph it but the waterings were causing an issue

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  5. #3

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    Thank you for the link. Looks like a possible pH issue.

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  7. #4

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    Quote Originally Posted by Huxley507 View Post
    Hello guys,

    A few of my plants have leaves that aren't looking so well.

    About 3 weeks into flowering. Some of the leaves are becoming yellow with significant black spotting. The rest of the leaves appear to be pretty much unaffected.

    Last feed was with Canna Pk 13/14 at the weekend. Prior to that liquid seaweed.

    Appreciate any help/advice.





    Pk is strong stuff! What level did you use? If coco ... flush em!
    Current Grow (3L coco autos) : Jumper's 2020 shenanigans

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  9. #5

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    Also full plant light off picture is needed ... leaf pics tell half the story ;-)

  10. The Following 2 Users Say Thank You to Jumper114 For This Useful Post:

    GEORGE (10-06-20), Mac (11-06-20)

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