Sour Diesel 5 weeks into flower and leaves are yellowing.... Pics inside!

Think it's probably Nitrogen deficiency but could be a couple of others based on what I have read hoping you all can help me confirm a decision and plan of action. Lady is in Happy Frog Soil in a 4 gallon pot, currently 5 weeks into flower and will likely be harvested sometime between 8/5 and 8/12 milky trichs permitting. I have been watering with tap water that has been left open at least 48 hours at room temp and ph it to 6. I am using Botanicare nutes, currently feeding full strength Pure Blend Pro Bloom Soil and Liquid Karma I also used the Pure Blend Pro Grow Soil nutes with Liquid Karma for veg. Temps range from 77f to 83f and its under a 600w HPS that I have dimmed to 450w to maintain temps (they shoot up to about 92f at 600w) in a 3'x3'x6.5' tent.

I only vegged the plant for a week and in that time it only received one watering with the grow nutes and they were at 50% strength, which based on what I have read is likely my issue as she was not able to stockpile the nitrogen that was needed to sustain through flowering. So the question becomes is my diagnosis correct and if so should I add a bit of grow nutes back in to supplement nitrogen, supplement it some other way, or do nothing/something I haven't thought of? On the flip side am I wrong and if so what is it and what should I do?

No opinions?

im ready to hear some opinions, i am currently going through the same problems with my sour D

big main leafs goin yellow sounds normal for SD....pick um off

I have lots of diff strains, ( attitude freebies ), and I just figure since i put the plant in the bud room say, 5 weeks ago... what would a plant look like 5 weeks into autumn? I take for granted the leaves will start turning colors and even dropping off... I just let it get a bit cold at nite and the leaves look like the trees outside in november. I am playing with colder temps for granddaddy purple this fall.

sour matures in about 8 weeks budding so as long as the " Fruit " is good? The tree will die, or look like it wants too. :+)

Well I dialed back my bloom nutes by 5ml per gallon and added in 5ml of the grow nutes with the last watering on the 14th and it still seems to be progressing at a similar rate. The plant still looks healty overall and bud growth is good so I am inclined to believe that maybe I should call it normal and leave it alone. As long as the pace doesn't increase too much she should still have plenty of green leaves by the time I harvest her. I will go back to just the bloom nutes with the next water which is probably tonight and keep a close eye on her.