After looking at the plant again, I would say it depends somewhat on what you want of the plant. I think you could go another week or so before flushing. Great looking plant! If you wait longer I think you might get stronger, more couch lock. I think it depends on what you want this bud to smoke like. I grow both sativa and indica, one for the day and one for the night. I take my Laughing Buddha (sativa) a little earlier than later and makes for a very heady talkative stone, indica I let go a little longer, but can only smoke it alone at night. 2 or 3 hits and it tends to make me a little paranoid and definite couch/bed lock.