Alright y’all I’m waiting on my extra lights today and starting flower , I’m using the fox farm soil and I know your suppose to flush before harvest(I know I’m not there yet) but at what point in flower do I stop with the nutrients and start with just PH water?
You can 2 weeks before harvest so the plant leeches remaining nutes from those stored in the plant. If you want to do a one-and-done flush, then do it about a week before you harvest with distilled or RO water. It will take several gallons to run your PPM down below 300. It’s not really possible to get PPM below ~200. 200 to 250 is my target for a flush.
The pH of the water you flush with on a final flush isn’t so relevant.
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