Zkittlez Autoflower Harvest Question

Hey guys. I have a zkittles autoflower growing now for 89 days or 12 weeks 5 days. I am unsure if I should start the flushing process? From what I can tell she looks about 2 weeks from harvest. But I want your opinion. Should I feed her a bit longer? The yield is small due to low wattage light (30w). I converted to a 240w light about 2 weeks ago to fatten this lady up a bit. Any advise is appreciated.