Do you smoke fruits???

Man what a dumb answer you have just given!
You flush before cutting it down so it removes that harsh taste you get from all those nutes that you have been feeding it!
A good idea is not to water for a week before harvest after the flush,speeds up drying!
Flushing thoroughly before harvest also reduces curing time.
It helps to begin positive metabolic processes turning any remaining CBG which is a non-physco active component of THC into THC.
And as the metabolic processes continue in curing the conversion of cannabergol(CBG) to tetrahyrdocannabinol (THC) will continue and the potency will increase!