Day 57 today and this is their last week. Things are looking pretty chunky so I'm excited to see what the final weight comes in at. My previous AK47 grow under these new bulbs and in this exact tray yielded 20 ounces on the dot so hopefully we'll see an increase when using Great White. Aroma, bud structure and plant health all seem to be 'normal' so other than a potential bump in yield, GW doesn't seem to be making a difference as of yet.
In regards to their final week, I wont be flushing. I'm not a flusher and know for a fact that plants have nutritional needs in the last weeks of their life. I'll be feeding at a little over 1.0 EC and today will in all likelihood be their last res change.
I also like to harvest when I see a combination of signs. Swollen calyxes, red pistols and cloudy trics all signify that my plants are done. Based on the look of things now, I'd say day 64 or 65 will be chopping day.
Here are the ladies, I'll take some final pics when I decide to chop in about a week. Cheers!