This is the way to do it. Just keep in mind that sometimes an amber trichome might pop up a bit early don't just chop them at that moment. you have to look at the shape of the bud and it's pistals too. The best indicator is the trichomes, but occasionally that can be a bit deceiving, especially if you are going a strain with colored trichomes. I grew a purple variety that actually had purple trichomes, it made for some interesting looking bubble hashsunnyside said: