hey man, a general rule of thumb is to use double your pot size to flush...EXAMPLE--> if you have a 4 gal. pot flush is 8 gallons of r/o water. "r/o" is reverse osmosis if you dont know already.
biff Reviewed by biff on . A question about flushing....... Here's what I got ready to go, and here's the next crop. This is my first harvest and I want to make sure that my O.L. doesn't vape any fertilizer. They're in 3gal pots and what I've done is pour a 5gal bucket of water through each one. I've read that one should flush 2 weeks prior to harvest but I need some advice. I figured I'd just do that every time I water and add no nutes because in two weeks I'm gonna put the 3 orange pots into flower. Is that the way to flush or am I Rating: 5