Harvest. They will continue to degrade as they dry and cure. This is peak harvest time in my opinion. I harvest at that exact point. A couple yellow, time to cut. Drying and aging will allow more degradation. You don't want to cut at 50% Amber then end up with 100% Amber by the time drying and curing is done. 100% my opinion , when to harvest, is when you see the first trichs change to yellow. He's at prime harvest time for max potency.....Just my opinion.