I cant really tell from researching but I'm guessing it is one of the two things from the title. What type of medium; soil or hydro? SOIL What brand and type of soil? FFOF Indoors or outdoors? INDOORS What strain? BLUE MYSTIC How old are the plants? JUST STARTED FLOWERING What type of lights and how many watts? 400W HPS How far from the lights? ~8"-10" What is your watering frequency and source of water? RO WATER EVERY 5-6 DAYS What, how much and when was it fed? NPK? FOX FARM TRIO AND BLACKSTRAP MOLASSES What is the medium/runoff pH and PPM if in hydro? LAST TIME WATERED RUNOFF WAS 5.9-6.0 What are the temps and humidity in the room? ~82 DEGREES / 30-50% HUMIDITY What size pots? 4 GALLON Any bugs? Look real close. NO BUGS Any other pertinent info?