When can I harvest after flushing coco medium?

Grand Master level was washing to 150-200, but his cut off zone sometimes was 400. that was huge commercial youtuber with thousands of plants, huge plants. i grow in soil, i dont flush, i just stop feeding way before harvest. 50% ambers is chop time 100% ;)))))) 30 is max in normal standarts. be sure you check bud, not leaf or sugar leaf, those mature diferently.

Why are you flushing? if its to lower the mineral content in the plant that is a myth and hold no grounds plants don;t work like that. tons of studies to debunk this. So you can just ignore the results as it does not matter and start your dry and cure. 50% amber weed is going to be crazy sedative. amber is degradation and means THC is turning into CBN. Chop asap and get ready for the extreme couch lock with dry eyes. Should have chopped this a while back when it was little to no amber and the pistils where dying back. Good Luck!

50% amber I would crop now lol but i am after peak potency myself but 400-700 seems like a very low ppm I dont think it would make much a difference if you did :) best of luck buddy.