Ok well basically im gettin alot of advice and tips & tricks from a few differnt friends of mine that do grow really good herb and they have been growing for years and they alwys told me to flush, and only flush the last week of harvest which would mean in soil ur only not feeding ur plant one time! In soil i only feed it every other watering! I have smoked bud that looks and smells great but tastes like shit and was told from older people that it most likely is chemicals, do u guys really thinl that feedin ur plany chemicals wont leave chemicals in ur bud?? That is common sense! I get what u guys are saying about the companies sayin watever to get u to buy there product and the royal flush might not work but over anything i will deffinitly flush the last week every harvest! Take this for example, if u cut a white flower or rose an put it in a cup of water with green food coloring the flower will turn green, which means it is in the leaves, ok u can either take it out of the water and dry it and the color will still be green which means the chemicals are still in it rather then flushing it with plain water! Get it?