GetThis, I think WW was referring to an actual schedule - one of "water, fert, water, fert." That kind of schedule. I think he's right to, as there's no proof that schedules work. For all we know it could be adding fert on top of fert and we don't know how the plants are absorbing the new stuff versus the old stuff. I used to use the scheduling idea and I grew good with it but at the same time, I have no proof that it really worked. I don't know if the plant would have grown the same without a schedule. Nature doesn't seem to use much of a schedule and plants grow just fine. But indoor growers are impatient and want plants to produce now, without waiting.