Some plants never get there….especially autos.
If the plant is healthy and still producing new white pistils throughout, I’d def sit tight.
But, if the pistil production has fallen off to a random one here and there, it’s a different story.
Contrary to what many say, it is easy to let a plant go too long. Most new growers never get to that point because of impatience.
I have let plants go too long while waiting on amber trichs.
The end result was less sticky and less smelly buds.
I’ve found that there’s a window where the smell gets slightly stronger and this is when I harvest. More specifically, when I stick my nose in the middle of the plant, I can just tell.
Do what you feel is best…..just don’t let the tips of the buds start to dry out…..that’s too long, regardless of trichome ratios.
I believe the plant is ripe/ready at a point and the trichs are what they are. It’s not a totally exact, to the day equation, but I think that window is usually only 6-8 days….
I don’t see a lot of white pistils and the buds look like they’ve went through their swell.
Personally, I wouldn’t give it any longer than a week. Depending on the smell, maybe not that long. Just my opinion…….and how’s its shaken out for me.