Hey man, amber trichs are telling you time's up. Harvest window closing.
Flushing needed to be done a week ago ... but don't panic. You're growing in soil, right?
Soil buffers nutrients, both in feeding and in harvesting. Not the same as growing with hydroponics .. your weed will still taste 'earthy' and fantastic!
Give her a good flush, a tenth of the pot size is ok (until the run-off is clear), once only, and leave for 48 hours and then harvest her ... she'll take a bit more drying than if you'd grown her 'dry' ... but hey, what's a few more days after months of attention?
Don't leave those trichs too long on amber though, or you'll end up growing a giant sleeping pill!
The idea behind giving them total darkness for 24 hours before harvest is to 'shock' them into delivering more resin ... whether or not it's true is a matter for men in white coats!
Good luck dude .. almost home.
Bud Support Uk