I would expect that if you water to a decent amount of run off each time there would be no need to flush. Works for coco/perlite mixes, so given the same watering regime, I can't see plain perlite reacting any differently.
sarah louise Reviewed by sarah louise on . Vermiculite / Perlite Flushing?? Hey guys, I remember someone a while ago saying that he grows in a vermic / perlite mix and it doesn't hold nutrients so doesn't need to be flushed (not final flush just a flush for ph reasons) I find this hard to understand due to the fact that the perlite holds water, wouldn't it hold nutrients too?? Thanks Guys! :) Rating: 5