Purple and dying yellow leaves at Week 8 of flowering

[colo89]

It’s the 3rd day of week 8 of flowering. There are lots of purple and dying yellow leaves throughout, Is this normal at this stage? There are 5 plants growing in soil, strain is Strawberry Banana OG kush. I’m watering each plant with about a quart of water every other day, water pH at about 6-6.5. I stopped using nutrients last week as the yellowing started and I couldn’t really tell if I was using too much nutrients or not enough (was using Fox Farms tiger bloom, half recommended dose). Temp and humidity remains consistent, temp dips a bit during lights off (12/12).

Trichomes are all milky white, waiting for about half to be amber.

 

[Moe.Red]

I stopped using nutrients last week as the yellowing started

This is your answer. It's often referred to as fade or colorful fade, it is the plant giving up the ghost on using those leaves and sacrificing them to use nutrients elsewhere (buds).

Some people do this on purpose. Others think it is a waste. You decide.

IF you don't want it to happen, feed to the end.