Question about my coco grow

This is my first coco grow and I'm not sure when yellowing of the leaves would start. I'm in week 7 of flower and all leaves r still green. I've even got some red and receding pistils but no yellow leaves yet (????). I'm growing diamond og and using heavy 16. I'm not quiet sure what to think. This isn't typical. Or is it?

Will they yellow when I cut back on nutes? I'm used to seeing yellowing much earlier than this but I've only grown in soil previously.

can anyone help me here?

The plant only consumes it's leaves if and when it needs to.

Your plant simply got enough nutrients to keep its leaves longer than usual.

No sweat, green leaves in week 7 is good. No green no grow. when you flush they should yellow. OG goes yellow easy.

thanks guys...i'm relieved...i thought something was wrong. Also got confirmation from the hydro store owner i frequent. He says that since doing hydro...he hardly sees yellowing or purple. He said green this late in flower is good as well