well if its outdoor 9 hours of light doesnt allow it to enter vegetative stage and most likely will turn male i would recommend u get a cheap light and veg it in a small room then put it outside for budding LEDs are pretty cheap
it looks like its not getting enough light have you loolipopped it yet? thats when u trim the whole bottom of the plant because they get no light so they r pointless to grow
have you tried wiping it? from my view it looks like the start of mites to me. if not you shouldnt have to worry its just mother nature doing here thing
i have a 4 inch fan and yes i have a carbon filter although im waiting for til budding to use it i might just move the other 2 pots farther and mainly work on the 3 and have the other 2 grow something even if its just an ounce