nutrient problems

I'm hoping for some advice on my first grow. I have problems with a White Widow Auto and a Pure Kush. The WW is at 98 days. Buds are big on the tips but small down the branches. Clear trichomes and still lots of white pistils. You can see from the first picture some leaf issues coming lately...

Any thoughts what May be causing this chlorosis to show up around week 5? chlorotic growth starting from the tips on the mid-upper plant with purpling of stems and petioles tat continues to worsen till harvest with a significant reduction in yield? Using botanicare kind@8ox base, 18oz bloom in...