Help diagnosis brown spotted leaf

[Gasman5.0]

Indoor grow Auto-flowers Jack Herer , GSC and OG Kush.
34 Days from seedlings.
250W led adjustment for 38K-50K PAR
Soil- Ocean Forest 1/2 and Happy Frog 1/2 of pot.
3 gallon fabric pots.
Nutrient Maxibloom and Flower Fuel always feed with @ ph 6.5 when watering and feeding.
One of my Jack’s has these brown spots on couple of leaves. Looks like magnesium decencies/lock too me but this is only my second grow and first autoflower grow.

 

[Gasman5.0]

I meant too type it looks like a Calcium issue not magnesium as I posted above. it’s only on middle and starting on the upper leaves now.

 

[Gasman5.0]

Humm.. No help so I went with my best guess. Flushed until runoff ph was 6.45 and flushed one additional gallon with 375ppm G.H. Maxibloom with 60ppm CalMag plus at 6.50ph. Placed the pot a wire rack and positioned a fan on it.. I also mixed 5ml CalMag into a 6.5 ph gallon water and misted the leaves. I’ll wait and see how she responds.
Note.. On initial flush I slowly saturated the soil till it dripped out 250ml.. caught and measured it and then let it sit for a few minutes and continued the flush and this time I caught the first 1000ml before pouring the water too it.

 

[Beachwalker]

Indoor grow Auto-flowers Jack Herer , GSC and OG Kush.
34 Days from seedlings.
250W led adjustment for 38K-50K PAR
Soil- Ocean Forest 1/2 and Happy Frog 1/2 of pot.
3 gallon fabric pots.
Nutrient Maxibloom and Flower Fuel always feed with @ ph 6.5 when watering and feeding.
One of my Jack’s has these brown spots on couple of leaves. Looks like magnesium decencies/lock too me but this is only my second grow and first autoflower grow.

I think I have some bad news, I think what you've got is called Leaf septoria; I'm unfortunately familiar with it, in fact I just found it on one of my plants tonight

Not 100% sure so recommend you research and get other opinions but if you come to the conclusion that it is leaf septoria recommend liquid copper fungicide, best of luck

 

[Gasman5.0]

I think I have some bad news, I think what you've got is called Leaf septoria; I'm unfortunately familiar with it, in fact I just found it on one of my plants tonight
View attachment 1072862View attachment 1072863

Not 100% sure so recommend you research and get other opinions but if you come to the conclusion that it is leaf septoria recommend liquid copper fungicide, best of luck

It looks like I have septoria on two plants for sure... the bad one in this post and another with just three leaves with one dot each that I could see easily so.. I’ll pickup some copper based fungicide in the morning and give each plant a detailed leaf inspection and treatment.
Thanks again for pointing me in the right direction.

 

[Beachwalker]

It looks like I have septoria on two plants for sure... the bad one in this post and another with just three leaves with one dot each that I could see easily so.. I’ll pickup some copper based fungicide in the morning and give each plant a detailed leaf inspection and treatment.
Thanks again for pointing me in the right direction.

You're welcome; It's bad news but it's not a death sentence, recommend removing all affected leaves from the area, increasing low canopy air flow and treating with a liquid copper fungicide or wettable sulfur product.

The latest set of pictures you've posted are 100% septoria..

I've used liquid copper fungicide with great results. Feel free to tag me in if you have any questions, good luck!

Edit: treat every plant in the garden, not just the two with the visible lesions; spray top and bottom of leaf, heavy coverage is necessary