I'll tell you this that some people believe that if you use nutes, that you want to flush two weeks before you harvest,to flush out all the nutes out of the soil,and so your plant will use up the nutes that it has in it.Then the last two weeks you just normal watering cycle.If you decied to flush it calls for 3 gallons of water for every gallon of soil.So a 3 gallon pot,you will flush it with 9 gallons of water.Its a little messy to do so think it out totally before you do it,so you do get to big of a mess.
IMHO "I" flush cause i have had MJ thats been flushed and MJ that hasnt been flushed and to ME,unflushed or nutes that are not stopped for two weeks(about) are harsher smoke,then if you flush or no nutes before you harvest.Plus i dont like to smoke chemicals.But like Stoney said there is'nt really any evedience to what i just said,but it will come down to you.Hope this helped?Good luck on your grow and party safe next weekend:farm: