First time grow

Week 10. The last week, or even the last few days before the harvest. Plant 1 is ready to harvest. I think so anyways. In 2 or 3 days. 60% of the pistils are turning brown. Plant 2 is also ready to harvest. About 60% of the pistils are brown. Plant 3 I might leave for 1 more week as she has about 20%brown pistils yet. She made it this far.. Plant 4 isnt ready yet. Still feeding her a small bit. Not too much. Still has all white hairs. (Northern lights auto). Flushing her out this week. Ive been flushing out the 3 ready plants for almost 1 week now. The run-off pH is about 6.7-6.9 for the three.