I couldn't help you on that one. I feed right up til harvest, no flushing.How do I know when to start the flush? I hear it's a 2 week process but how do I tell when to start? What's the down side of starting too late or too early? I haven't been noticing any changes lately in the size or shape of the buds. I have been checking the trics with a jeweler's loop I am not 100% sure on how they are supposed to look but I notice cloudy and clear trics no amber yet. Thanks