Plants turning yellow

Yes as normal as can be. Its auntum in the plants lifecycle and its turning yellow just as most other plants at this time of the year. Trees for example do that to save the chlorophyll in stems for the next year and cannabis uses the stored energy for the flowers as its just a one year plant and will die soon anyway, nature is very efficent. If it starts earlier and from the bottom up its probably nutrients. Good Luck

For me the Girls look right in Time, time is going by and they wont look fresher , thats for sure, its for me a normal sign of getting ready.... greetings

I wouldn’t over stress about it. You’re so close to the end. She’s probably a little hungrier than what nutrients are available and in a last attempt to keep producing flower, she consumes her fan leaves. Just keep doing what you’re doing and don’t change anything and let it do her thing. At the end of the day buds are the prize, not fan leaves.