I have four plants(hindu kush & girl scout cookies)in soil at wk.6 of flowering. Both strains have an estimated flowering period of 7-10 wks. I know they say you should flush plants 2 wks before harvest. I don't have kit for testing soil & I know this is a question that really doesn't have a precise answer without soil readings but being at wk.6 should I stop nutes now? Judging by naked eye plants look like they could possibly even go the full 10 wks.