The red stem says the PH is too low.
That locks out Phosphorus.
Attachment 298117
Because she can't process Phosphorus, she is looting the fan leaves for mobile elements.

As for the best way to fix that, I'm not much help.:stoned:

A real grower should be along shortly to advise.
While you wait, I suggest you visit our archives and look it up.
Just click on the first line in my signature.

Aloha,
Weezard