Mg deficiency or what?

Discussion in 'Sick Plants and Problems' started by 420BPM, Nov 13, 2022.

  1. Hello dudes,

    I have 2 autoflowers in flowering. The medium is Coco/perlit i have been feeding them 1700 ec. Yellow sports appearing on middle to high leaves I aim for 6.1-6.2 ph but using drop ph test so not that accurate.
    IMG_20221113_223008.jpg IMG_20221113_223022.jpg IMG_20221113_223143.jpg
  2. Magnesium deficiency is most likely the cause of those leaves. This plant loves its Magnesium.
    • Agree Agree x 1
  3. 6.1 might be a tad high for coco. I generally run coco around 5.7 to 5.8. In flower will push it up to 6.0 or 6.1 if calcium def are showing but don't want to push EC by adding more to the nute solution. Otherwise I like to finish flower in coco around 5.9 most strains.

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