when is best tm flush

Hi people. I've got a question that's been on my mind a while. Im into my 5th week and thinkin about flushing in the coming weeks. My plants are 15 northern lights and two cheese. Now do i feed nutes right up till my plants are into the 8 week period and then flush for a couple of weeks flushing with plain Ph water or do i flush for two weeks within the 8 week cycle

i know this has prob been answered countless of times but can't find a direct answer

thanks for all info

i always start flushing 2 - 2 1/2 weeks before harvest .. with ph'd plain water

as above mate

I flush after I'm completely done wiping.

spandy said:

I flush after I'm completely done wiping.

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forgive my stupidness but what do you mean by wiping?

OOk guys so ill feed nutes up until end of this week them start flush with Ph water until harvest