Hi,
Your girls are still fattening up, so I wouldn't be flushing as you can still be feeding lightly for another week. As long as you give her a 7-10 Days in some cases 14 days depending on how well you can flush, nothing wrong with going a week extra on nutrients lightly because you will still flush at the end. Then, for the last 2 weeks just give her plain pH'd water. Try to remember if it looks ready, let it go another week.