As far as I'm concerned you only do it once. Last time I flowered I only flushed once before water and then stopped feeding them. At any point if for any reason it seems like theres still too much fert. in the soil there would be no problem with flushing again so long as thats when theyre supposed to be watered again. Let your babys speak to you and pay very close attention. Not sure what other advice I can give you so good luck and Happy growing!:smokin:

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