I don't know soil but sounds like a silly schedule.
First off nutrient schedules are almost always super high from where they should be.
Second off, flushing? Lol. If you don't overfeed then there's never a need to flush a plant.
[/Q lol it's really not that hard or silly lol, let me give you a example, i'm guessing you grow indoor? ok when you put your nutrient in your water do you check your ppm with a meter, well if you do? then the numbers you see is the nutrient amount your feeding your girls, ok so let say you are hydro than your nutrient that your girls don't eat get recycle in your system, the difference in soil is the nutrient when adding holds in the soil, and everytime you add nutrient your soil build up until you use ph water to wash some of the nutrient out, lol i don't do a full flush when bring down my ppm, rather than doing a water/feed/water schedule, i do a water/water/feed schedule than give my soil time to bring down the ppm to the level i need lol