not going into mass details here but part of my reason for flushing with clean ph adjusted water is to get the last of the carbohydrates running round the plant and been turned into sugars.
I start by gradually weaning of food last 10-14 days, not stop feeding but changing the npk ratios.
On my water only I take the ph throught the ranges for the last waterings from 5.8 - 6.5 then all the way up to 7.0 for the last water. Personally and agreed by many friends, I know there’s a difference in the end product taste, colour and scent in the white widows. But I have worked with that strain for over 20 years so had time to play with it in soil, coco, hydro, aquaponics, etc
So elaborate, I even tried CO2 rich water, and O2 rich water to see the differences, I enjoyed experimenting in my youth when I had the time and premises to do so.
A quick insight;