Name that Imbalance!!!

Whole garden looks like this, and ive already lost one plant. Please help. I thought iron, but its not white!

scope for russet/broad mites - this is the summer of russet love ya know

How much more to finish plants??

It doesnt look so bad if its few leafes affected... and i sees on some leafes it look
like Mg deficience.

Mine advice will be to give them secondary Mg,S and Ca in next watering... also you must know its a normal thing some fan leafes dies at the end of a ciclus.


Regards

They still have about a month to go. And yes i am aware that the plants will use up what stores they have built up. However i have not started flushing plants yet. And this isnt a normal late season N def...

Leafes like yours on pic showing intervenal clorosis and thats a sign of Mg def for sure,

i advice you you give them next watering beside NPK nutes secondary elements and
thats normal thing that in the end of flowering plants show hunger for secondary
elements..

so a bit of Mg,S and Calcium and i think they need to sustain this month and bounce
back in green whithouth any more defs..

Putting MgS in your soil could be disastrous in the long run. It might help these plants but in the long run you will be bringing up Mg levels in your soil which will eventually cause compaction. This is mostly due to each elements physical size. If Ca were a beach ball, Mg would be a marble. The beach balls will have a lot more airspace for roots to explore/breathe than Mg.

If you suspect a Mg deficiency, give the plants a foliar spray of MgS (epsom salt). If health isnt returned to the plants, you know that assessment was wrong & you haven't changed you previous Ca/Mg ratio.

Iron & Sulfur deficiencies are very similar & will start at the top of the plant because once set in the plant, they are imobile.

That looks like a soil pH issue to me.