Sour Diesel Yellowing at Day 50 Flower Normal?

So is this too early for Sour Diesel to yellow? Do I let it go and continue with the roots feeding schedule or give it another nitro boost. My research tells me that SD needs a bunch of nitrogen. I did give a nitro boost at week 4 of flowering, but all of this yellowing happened within week 7. I was planning on letting her flower for 11 weeks, or based on a few Amber trichs.

Store bought clone, supposedly the authentic sour d strain.
600w hps and supplemental led lighting
5gal smart pot
Roots organic soil with full roots nute line
temps never go over 80 or lower than 64

perfectly normal

Thanks for the quick response. I thought it might be normal but it happened within one week and I have about 4 weeks left.

Yea, looks normal to me too. Nice plant!

Sour D is a 9 week strain, not 11. And it seems your plants are going into senescence like they should at 50 days.

Very nice mate sours are my 2nd fav after hazes. Dnt worry bout the yellowing that's normal its self cannabolisum you only got about 2 weeks left on a successful harvest