Time to flush ?

I experimented once with the clones from the same mother doing half with a flush and half without. I found no difference in taste and strength of the dope. The only benefit of a flush I found to be saving money by not using nutrients for the last week.

No need for flushing , there is no effect in doing that.. here is alink to astudy https://www.rxgreentechnologies.com/rxgt_trials/flushing-trial/ just keep on feeding her , no need to let her starve

The buds will ripen from top down. But if I was you I would go to straight ph water for your 2 weeks then 48 hours of total darkness, then harvest. Good luck and enjoy the harvest