Is plant systematically turning yellow

I have a 6 footer that has lots and lots of leaves, buds too of course. My question is, is this plant systematically eliminating extra leaves? I ask this because every other day I am plucking off 5 to 10 yellowish leaves. Plant is in great health overall. Not concerned, just curious.

when the flower the suck all nutes out of the leaves the leaves then yellow and fall off so es it is normal. dont pull off unless real easy to pull. got an pics.
what st?rain
nutes ?
how long been flowering?