I don't think I've ever seen a description of when flowering actually begins. I know to expect around nine weeks for my plants to flower, but nine weeks from when? From when I switch my lights to 12 on 12 off or from when I see first signs of flowering? I know how to check trichs to see if my buds are ready, but I am more looking for a baseline to compare to so I can tell if what I'm seeing in my plants is normal.