What ppm at harvest?

Joshdude

New Member
Hey guys I’m new to the rollitup community and this is my first photoperiod grow. The strain is white widow (obviously) and I’m harvesting in less than a week. My runoff ppm is 480 right now as I’ve been flushing for a week. What should the ppm runoff be after her last flush before harvest?
 

lime73

Weed Modifier
Flushing is to reduce salt build up in a growing medium.
Or if its overfed you can flush some out of medium if done immediately after fed incorrect nutes.
 
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