Brown spots on leaves

This plant is exactly 4 weeks into flower in coco/perlite 3 gallon being fed twice a day. Two days ago I upped the EC from ~1.175 to ~1.275. I'm using jack's with a calnite to epsom ratio of 1.4:1. I'm not sure the spots are totally new, but I hadn't noticed them until now, and they do not appear on any of the lower leaves so it seems unlikely to be simple nute splash. What do you make of this?

I think too much mag is locking out calcium making it show as deficient.. Loose the epsoms..
See if that helps..

HydoDan said:

I think too much mag is locking out calcium making it show as deficient.. Loose the epsoms..
See if that helps..

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I'll give it a shot, thank you!

Are you DTW or recirculating? Try lowering your ec just a bit rather than raising it. I run a coco/perlite recirculating system and have to keep my ec at .8-1 or I start burning leaves in flower. I feed often though, like 5 times a day, so the amount is not as important as the availability. I don’t know your style of growing but raising nutes is not always better.

Hook Daddy said:

Are you DTW or recirculating? Try lowering your ec just a bit rather than raising it. I run a coco/perlite recirculating system and have to keep my ec at .8-1 or I start burning leaves in flower. I feed often though, like 5 times a day, so the amount is not as important as the availability. I don’t know your style of growing but raising nutes is not always better.

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DTW, first I've heard of recirculating in coco. You may be right about the EC, this is my first plant in flower and I figured I would push it as it has gotten larger, but maybe it's too far.