Alien3000 ,,that's a pretty plant. Good job, you can flush anytime you want to, but if your talking about your final flush, you still got a long way to go at least a month before that plant is gonna be ready to chop down.
Everyone does it a little different, but I always wait until I see some amber trichs, before I flush my plants ,when Im using nutrients .
You don't have to flush, if your in good soil. That sure is a pretty plant.
Plus them buds are still growing and are gonna get larger.
Watch for the white pistils to turn red and start receding back in the buds, then you still got a ways to go.
You can only use what the seed banks say ,as a reference, you harvest them when they are ready, very bad thing to harvest early, makes your heart beat way to fast. Bad experience.