at least two weeks, imo.
use rippen to geat them finished!
rippen tells your plants that it's time to get finished, and gives the nutrition they still need at the final stage...
I use rippen (only water, ph to 5.8 + rippen), strating 14 days before harvest for 10 days, the last 3 days only
ph corrected water (ntf system with rw cubes)! longer flush when grown in soil or coco. rockwoll is flushed quick!
better taste when you degrade the nutrition at the end and when they get flushed!
get a 60x microscope, and watch the trichomes. as soon as 80% got
golden, and more intransparent they'll be ready!

Not all strains get brown "hair"!
