Rust looking spots

STAYINGONMYMAINCBATORUNTWOstarted grow question 6y ago

Anyone know what this is? It’s only on 4 of the bottom leaves of my purple lemonade! I plan to give them cal/mag on their next feed to be safe but knowledge is power?! And I would like to know for certain!

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Leaves. Other

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the_canna_scientistanswered grow question 6y ago

What is the PH of your substrate? Looks like needs some calmag to me, however could be other things depending on the PH.

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STAYINGONMYMAINCBATORUNTWOanswered grow question 6y ago

Still no resolve yet! Continues to happen on the lower leaves and some came through on some upper fan leaves only on the purple lemonade??

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