i have yet to hear of anyone who has had a mazar i sharif purple up during flower...my nighttime temps only average about 7 degrees less than my daytime temps...and i know it cant be nitrogen toxicity because I haven't fed them in over a week and a half...i know purple doesnt mean anything but they sure turn eyes...i did have a better pic a few days ago...but i deleted it...damn paranoia...anyways...enjoy my humble picture for your enjoyment