Help!! Plant is rapidly declining

Hey all, so I have been searching far and wide to figure out what is wrong with my flowering blue mystic plant. I am 5 weeks into flower. Initially, the plant had all these dark orange dots, and I thought it might have been rust. So I did the foliage baking soda spray with a hint of detergent(unscented Castile), which is the treatment many recommended for “rust” fungi. That didn’t work, so I thought maybe magnesium deficiency, treated with Epsom salt through roots. That didn’t help, so I did a flush for 3 days thinking maybe it was nute lockout. This seemed to make the problem worse, and now I have multiple plants that look like this. Does anybody have a clue what this is? Please help!! Everything was going perfectly until this. I’m not sure but it seems to be spreading to the other plants little by little. Also, whatever the case may be, is it possible for the buds to be okay?

Btw one of plants is hydro and the others are dirt. I’ve tried feeding the dirt ones thinking it was some sort of deficiency with little change

Do you know the pH

6.0

Did this start at the bottom of the plant

They are either burnt from too much nutrient or you've got a severe cal-mag deficiency or both. Try giving soluble cal-mag if you haven't tried that yet. May be too far gone for Epsom salts to help and you need an active mix for that to even work.

Bose said:

Did this start at the bottom of the plant

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Bose said:

Did this start at the bottom of the plant
No it seems to have started at the top and worked it’s way down. The leaves on the bottom started yellowing, but yellowing for lack of light, and leaves look different than what I’m dealing with on top

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I don't know your supply situation but personally I would toss that and I am usually very let see what happens. Would suggest you stop all of the remedies and give water or last rites. Trying to be positive but ...

Bose said:

Yellow Leaf Spot (Leaf Septoria) & Cannabis - Get Rid of It Quickly!

Yellow or brown round spots appearing on leaves and spreading? This Yellow Leaf Spot aka Leaf Septoria fungus can attack your plants, learn what to do!

www.growweedeasy.com

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This not the cause of every plant problem!Stop blaming septoria,there is something else wrong. looks burnt from too many things,what are you feeding?

Possible overfeeding turning the grow substrate toxic causing both burning and deficiencies at the same time. You don't provide adequate information for anything more than a guess.

What are you feeding? Be specific.

What are you growing under?

When you say your pH is 6. Do you mean you're feeding and watering using a pH of 6?

How close are the light? Could you be burning them? I’m sure you have looked for mites?