Leaf Septoria or deficiencies?$

Rob Roy said:

The upturned leaf can be a sign of magnesium deficiency. Even if magnesium is present, too much calcium can inhibit the uptake.

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MylesImp46 said:

Hey guys, these are a few of my autoflowers a couple weeks into flower. Over the last week I’ve noticed some changes in the coloring of the leaves. I’m running on 300 watt LEDs. My soil is a 70% FFOF and 30% perlite grown in 3 gallon pots. One is a 5 gallon. Run off Ph is about 6.7. 18/6 light cycle watered about twice a week until run off. Just started a cal/mag and tiger bloom feeding this week after thinking I may be running into a calcium or magnesium def. Now I’m thinking maybe magnets or leaf septoria because I’m seeing spots on some new leaves closer to the top. Any ideas?
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MylesImp46 said:

Hey guys, these are a few of my autoflowers a couple weeks into flower. Over the last week I’ve noticed some changes in the coloring of the leaves. I’m running on 300 watt LEDs. My soil is a 70% FFOF and 30% perlite grown in 3 gallon pots. One is a 5 gallon. Run off Ph is about 6.7. 18/6 light cycle watered about twice a week until run off. Just started a cal/mag and tiger bloom feeding this week after thinking I may be running into a calcium or magnesium def. Now I’m thinking maybe magnets or leaf septoria because I’m seeing spots on some new leaves closer to the top. Any ideas?
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