Show us a close up of the bottom of the affected fans
That first picture looks like Thripp damage.
If you see tiny, black, spheres, whip out your Loupe and look closer.

Might not be a deficiency.

Aloha,
Weezard
Weezard Reviewed by Weezard on . need help finding out what nute deficiency i have asap need help diagnosing deficiency asap Hi I have got some sort of difficancy and I need help with a diagnosis if that is possible, I am growing growing blueberry in coco and I'm 5 weeks into flower I feeding canna A & B, canna boost and just started using PK 13/14 yesterday. pH 5.8 About two maby three weeks ago I started to see rust patches in the centre of what looked like perfectly healthy leaves and it has steadily got worse, i now cave two plants that are looking really rough and the Rating: 5