Mine started to smell like strong reg plant (not MJ) like 25 days into VEg, and they really started to smell like MJ when the buds started to appear which was about one week or 2 weeks after flowering. Now all I do is take this thing my wife has its a small oil burner. All you do is burn small tea cup candles at the bottom and the scented oil burns at the top, that stuff is so strong the whole house smells like the oil scented candle but it usually only lasts untill the oil is still burning.