Canadiananswered grow question 4 years ago I must agree with the other fellow grower your flower pistils still are shooting to the sky they have not turned all of them Brown , orange , or red and they have not curl down which is a clear sign that you are completely ready.
This is only my personal opinion but flushing is overrated is better to stop giving the nutrients the last two or three weeks and they will use up everything they have in your pot and then they will start getting from their own leaves more nutrients and in that way you will have a better tasting flower but it is impossible to take away the nutrients the plant has absorbed during their life cycle and specially just because you flush.
Again this is a very touchy subject with a lot of Hardcore Growers but in my experience doing with and without doing with water using other chemical products I have realized that flush or putting the plant in darkness it is something that is overrated and truly does not increment much of nothing. It just cause unnecessary stress at the very end of their cycle when you can have a perfectly healthy Bud without any stress.
Hope this information helps you out good luck with your garden