Hi Al….. I’m a BIG believer of flushing the coco through in the pot 1st before I plant up…… I do this by using warm water pH 5.5 and around 5-10 ltrs sometime I add half strength feed too so the coco is primed and I know it’s ready to use….. Cal/ Mag can also be used to flush and throughout the crop…. but I never have …. I’ve found that if I do this 1st the crop always start off well and I’m not wondering if there is an imbalance in the coco substrate or it is still young and not been allowed to sit for at least 12 months prior to being packed.
Josh