I wouldn't cut off the nutrients quite yet and it surely isn't time to start flushing if you do that now you'll hurt your yield. This plant has at least a month to go maybe even more. Harvest when 70-90% of the hairs have darkened for the highest levels of THC, or Harvest when 90-100% of hairs have darkened for a more calming, anti-anxiety effect as some THC turns to the more relaxing CBN. By this time most of the trichomes will be milky/cloudy and the plant will be ready to flush.