dr. half-awake here 
…
I’d say heat has been an issue. 
And maybe a high pH or low Nitrogen on the more yellow, ragged stuff.
If the leaves got worse I was almost thinking russet mites 
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dr. half-awake here …
I’d say heat has been an issue. And maybe a high pH or low Nitrogen on the more yellow, ragged stuff.
If the leaves got worse I was almost thinking russet mites