Why flush? Did you over feed it? Flushing doesn't do anything it's an old wives tale. You can't change the molecular contents of a plants buds by running tons of water over the roots. Your stressing out your plant in the last week of flower for be no reason except you heard everybody else say it does something. Dry and cure it properly is all you need to do. https://cannabis-science-consulting.com/flushing-cannabis/