When do you guys start your pre-harvest flush? Do you flush when all trichomes are milky, milky with some amber, etc.? I know I can change the type of high based on when I actually chop the plant but wasn't sure when to do the actual flush since there is a 2 week lead time. Here is what the plant I'm looking at harvest first looked like as of yesterday (sorry for the crappy pic I had to use my phone to take a picture of the microscope).
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I flush/leach when most of the trichomes are cloudy. From the looks of your plant, it looks like it still has quite a ways to go. You can also get a general idea when most of the pistils on the plant have turned from white to brown.