Robertsanswered grow question 3 years ago If you are using bottle nutrition you need to flush. And Mr nobody explained a flush where you just provide water letting plant use up nutrition. Causing a fade. Bottle nutes if being used in right amount will make flower bitter and nasty. From experience speaking. Not some article, blah blah bs. I personally ran my own experiment. So I highly recommend flushing if using fertilizer or plant foods to feed plant. Good luck and happy growing 🌱