I never Flush inbetween, if ph and everything is ok. because the soil is like universe millions of mivrobacteria live in your soil and help he plant to get the food. Flushing means disturbing them. You can help the bacterias if you give some molasses in your watering. ( 1 tsp/l).Nice the schedule works for you. And last tip, use another thread for binding your ladies, i had that too and cut a number of branches, because its so sharp. Iam actually using pipecleanders. they are very soft to the plant, but they are as strong as the one you use