Is this nute burn?

@VILEPLUME. Can you provide some details?
Type of soil? Brand?
Nutrients used. Feeding frequency and strength.
Water source? Tap, well, mineral, distilled.

To me, just going off of what you have pictured, It looks like a couple things. First would be over fertilized. Second would be potassium deficiency.
 
Yea, some extra info would be good.

But I would second the calcium deficiency idea.
Calcium deficiency tends to leave brown spots like that, progress down the leaf and all the way to middle.
Potassium deficiency usually shows more on the leaf edges. At the very beginning it could look similar when just the leaf tip is getting discolored.

As for calcium deficiency, check what you are feeding, humidity levels and that you have enough air movement to have good transpiration.
Calcium is pulled passively within the plant, so you need to adjust transpiration to feeding levels.
Also consider that too much of K will interfere with absorption of Mg,Ca. Same goes the other way.
 
@VILEPLUME. Can you provide some details?
Type of soil? Brand?
Nutrients used. Feeding frequency and strength.
Water source? Tap, well, mineral, distilled.

To me, just going off of what you have pictured, It looks like a couple things. First would be over fertilized. Second would be potassium deficiency.

Hey thanks for your reply.

I'm using these organic nutes and following their recommended doses: https://ngsc.ca/products/veg-to-har...25826&pr_ref_pid=6738744016994&pr_seq=uniform

I'm also adding a table spoon of unsulfered molasses weekly.

My soil is the Promix Organic soil mix with added worm castings. Everything was growing great through veg, but now that I'm mid-flower I'm getting these brown spots on my leaves.

Water is tap city water that is left out for 24hrs so the chlorine is released.

I have some gia green oyster shell powder that is high in Calcium, maybe I should try a top dressing of it?
 
With different organics you get different release speeds,
so that's the learning curve on those.
I'm of little help with those, but shells/bones usually I'd say will decompose pretty slowly.
Especially at the very top of the soil, grind them up to a dust and mix them in the top layer and there is alot more calcium leaking from them.

Gypsum will be more readily available.
All in all, careful how much you add certain elements, because they might interfere with absorption of others.
This case too much Ca could show up as K and Mg deficiency.
And as always, necrotic patches, dont recover but the issue should stop progressing quite fast.
So keep monitoring how she reacts.
 
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