Quote Originally Posted by Weezard
You have the best answer from "Smoke my piece";

"Day 44 and showing slight yellowing.. I think thats natural, as the plant is heading toward the end and using up nutes in the leaves. If you've been giving the same amount of nutes for the past few weeks and its just now starting to yellow like that, i think its natural."

 When the light is strong, and/or the temperatures high during flower, the gals will try to outgrow their roots.
In order to do that they take stored mobile elements like Nitrogen from the fan leaf.
The fans are used as photocells when vegging, they supply the energy to grow each node.

But their secondary job is storage.
They stash nutrients for the girls to use during flower, when they are no longer needed for stalk growth.

So do not remove them until they are finished "giving".

When they are "empty", the plant will form an abscission layer where they attach to the stalk and will drop them as a natural mulch where they get to recycle the non-mobile elements as well.
The abscission layer seals in sap and seals out pathogens.

You can keep them green throughout by lowering the light and applying high N. ferts.
However, high Nitrogen will screw-up flowering and can promote "foxtailing".
So, be's' let 'em get a li'l funky lookin' an' they will be a smoother smoke.

In short, it's mo' betta, to jus' let 'em do what they gotta do.
 It's natures way.
Aloha,
Weezard

cheers man! thanks alot!