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What deficiency is this?

Discussion in 'Sick Plants and Problems' started by EAPaaron19, Aug 10, 2021.

  1. #1 EAPaaron19, Aug 10, 2021
    Browning on the sugar leaves on the top. Only this 1 plant is doing that in my entire cycle (Zkittlez strain)

    What is this? And how do I fix?

    I have had this happen on 1 different plant before in the past last year and never figured it out

    20210810_114252.jpg
     
  2. #2 StickyBudHound, Aug 14, 2021
    It's only happening on a few tops like that, nothing happening on lower leaves at all? No other symptoms at all?

    It doesn't really look like magnesium or calcium deficiency. If you rub a finger across a brown spot, does some color come off on your finger? If it does, the plant could have a rust fungus. If not, the closest thing I can match it up with is copper deficiency, which is usually most noticeable on top leaves closest to the lights during flower.
     
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