Flushing is a matter of opinion, i do it.
Hydro 3 days to a week, soil 2 weeks.
I cut the plant down trim the fan leaves with stems, and leave the rest on.
Slow dry at 60% humidity as whole plants hanging till the stems snap, i usually dry 11 to 14 days really slow.
Then do a dry trim and into jars, use hygrometers to keep the jars at 60-63%. Burp them daily for a week, then once a week for a month. If humidity in the jars drops below 55%, add the 62% 2 way humidity packs to the jars. Wait 3 months
and it will smell like Jesus's n^+ sack.
Patience......