Chow_13answered grow question 3 years ago You will be harvesting before you loose all of the leaves. It will start at the bottom and slowly start moving up. It looks like you have a slight nitrogen toxicity( leaf tips sharply curl down ) But everything else looks good. Nice grow!!! I would stick with just water or a very low nutrient concentration. The last bit of flushing is to make sure you don't have excess buildup which can cause bad taste and harsh smoke. Some growers wont flush at all but will drop feedings down to a point they know they are starving the plant.
Happy Harvest!!