Burmeseanswered grow question 4 years ago Hi there! Firstly, for me, the day I see first pistil would be the first day of flowering. Secondly, flushing or not flushing is very debatable. But if you want to flush,You might not accurately know when to flush by counting weeks.You can know more accurately by checking trichomes colour.Here’s my harvest window.If trichomes are mostly milky/cloudy about 80/90 % and fill with some amber colour, it’s the time.For me, I would start flushing during that time.Happy Growing... ✌️