that is a hot subject, but the study i read says, just cut nutes. water, not wash out. (this was the cost effective result, since the plant didnt use the nutes or the extra water for any significant value. it said in running 24 plants, in control groups of 4, so 6 groups, they did the differing watering and flushing techniques and said no statistically significant differences in any. that the chemical analysis of the plant and its runoff showed the plant took no nutes during the time. many will swear by one thing or the other, and i have no personal hands on experience with the differing ideologies, so i am just telling of a study done... if it were me, i would follow the farmers here on this... but i am aware of the study and thought i would pass it along.