White Widow Express Auto

Week 15, Day 106 of grow. Day 12 of ph water only flush. Still no amber trichomes visible. Been waiting so long for them my eyes are trying to trick me. I think I see a couple to discover there is a pistil behind. Buds are now a deep purple and have really swelled over the past week. Never come across this before. Normally very clear through my loupe. Hopefully tomorrow my digital microscope will arrive and I'll decide whether to water for a couple more days, choke for 2 days (no water, only lights) or harvest depending upon what I see with the microscope. Update: Digital microscope arrived. Confirms my observations with my loupe, little to no amber. I'm going to give her a few more days on ph water, then choke for 2 days before harvest. Damn those elusive amber trichomes!