Disregard all myths that have been proven to be BS regarding the flush.
A βflushβ is only used to force a plant to go into shock which may or may not increase cannabinoid quantities. However given that a flush is done in the last week or two this is really meaningless as 1-2 weeks does not allow the cannabinoids to mature before harvest.
The plant will also use up starches and sugars in remaining fan leaves only. NOT THE BUDS.
THE BUDS ARE A SINK for all nutrients and will stay there permanently. This is scientifically proven. A flush is still good practice as it may or may not decrease harsh consumption from Chlorophyll in remaining sugar leaves if you happen to consume remaining on bud sites.