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what's wrong with these leaves? is it mold ?

Texasautoflowers
Texasautoflowersstarted grow question 10 months ago
Growing 5 autos in 5 gallon bags, roots organic soil, week 4. All 5 different strains, only the blueberry is having these weird leaf issues. Is it nutrients or a mold?
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AsNoriu
AsNoriuanswered grow question 10 months ago
Calcium, but looks more like all leaves, who touches verge of pot, could be mechanical damage . If any rusty spots appears on other leaves - calmag to the rescue !
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m0use
m0useanswered grow question 10 months ago
Does not look like mold. maybe could be some issues with Calcium or Phosphorous or even PH in the medium messing with the roots.
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