Nute Burn?

3 weeks into flowering and alot of the bottom leaves have died off and it seems to be working its way up slowly. what should i do?? flush with twice as much volume as the pot with fresh water?

BUmmmp

flushing cant hurt so flush it then give it 3 or 4 days before you start feeding an watering again
also the leaves do naturally yelow an die off towards the end of flowering but not 3 weeks in

okay. thankyou. i usually give it around 700 mL every 4 days. is that sound right? Im going to try flushing it and see what happens