its funny how many people i have already seen on here that say there is no need to flush when i myself have smoked the difference between the two and can say for sure (growing hydro cant speak on soil) that you need to flush before harvest in order to prevent harsh, hot, smoke. and if you want to feed nutes until the point of harvest then that is fine. on the day you would plan to harvest wait 3 more days give a clearing solution the first day and plain water the next 2 days, snip cut. thats what clearing solution was developed for. duh. and three days longer will not hurt and only let your plants ripen a bit more because if you dont know that flushing is the right thing to do yet then you are most likely pulling your plants to early as well.