How To Use Progressive Web App aka PWA On 420 Magazine Forum
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Theres alot of different opinions
Personally i give nothing but plain water to the plant for about the last week.
I'm new to growing as well, so keep that in mind, but as I understand it, it's highly dependent on your growing medium.
If you're in soil you flush for 1-2 weeks with just water on the same schedule you would have normally watered / fed them. In coco you do it for about a week, same schedule (although you'd have a super hard time overwatering in coco with good drainage), and in hydro you do it for like 2-4 days.
I'd suggest you get more input though, I don't want to be responsible for screwing up your plants, heh.