Technically speaking, flushing is nothing but washing the nutrients from the grow medium that you are using which allows the plant to smoke less harsh and taste less green.

If you are an organic farmer, there is no need to flush the grow medium as you probably won't have chems in it anyways.

Just stop adding nutes during the last 10 days.
HARDDON Reviewed by HARDDON on . Is Flushing Necessary When Growing Organically? I'm currently growing in Humboldt's Happy Frog, my nutes are Pure Blend Pro Bloom for Soil, Cal-Mag Plus, Bio-Bizz Topmax Bloombooster and very occasional Liquid Karma...many of my grow books recommend a flush every 30 days but i've read on the forum that flushing is not necessary with organic soil grows...if flushing is necessary how often should i flush besides the obvious flush 7-14days before harvest? Thanks in Advance Rating: 5