Hello
@NullHypothesis ! I always flush before harvest. Super soil or not there are always minerals in the soil for the plant to absorb no matter if they came from dried amendments that have been broken down by microbes or they came from bottle nutrients organic or not. Its a huge misconception that super soil doesn't need flush. As for dark periods before harvest, ice cubes in the soil, cutting the leaves at half and stuff don't have any scientific buck up. What has scientific buck up is that when you harvest the plant at the dark time of the light/dark cycle you get more terpenes. Happy growing ! 👍