Hey there, so if your still having white pistils and mostly milky trichs, id say save the flushing for when you're seeing a bit of amber with the milky and also when theres nearly no more white pistils. But most specifically the trichromes will be the guide. You could slowly back down on the nutes over a few days as you go towards doing the flush? While the pistils mature more and trichs are closer to where you want them. In my opinion you can't be more than a few days from beginning to flush. Happy healthy growing. ✌️