Phosphorus deficiency??

Picked up some teens from local dispensary that were heavily rooted in one gallon pots. Asked what they had been feeding and they said only calmag. Plant is showing necrotic spotting on mostly older growth and some newer growth too. Plants also came with a little bit of powdery mildew but after hitting them with hypochlorous acid and neem oil that problems taken care of. I’m wondering if these spots could’ve been caused by the mildew. Here’s a picture, lmk what y’all think.
 

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Rurumo

Well-Known Member
I don't think it's fungal. They look pretty good, just get them started on a proper complete nutrient with the correct PH/EC and they'll take off.
 
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