i'm not going to start a tirade. i'll just tell you, i don't flush. i don't think its a good idea. once a nutrient has been absorbed by a plant, you can't wash it out. all you can do it starve it of what little it does still need from nutrients at that point. i may give a light feeding the last week before i plan to harvest a plant if it looks like its hungry, or i may just give it a regular watering with ph'ed water if it looks like its still working on the last feeding. the only thing i do is quit watering at all 3 days before. don't know if it speeds up the drying process at all or not, but it seems to, a little....maybe.