That's interesting, day length must be around 14 hours or less at the moment then?Day 35 and Fire cookies are into flowering ! I dont see a difference in the flowering period between autos & photos in outdoor Indian weather.
Should I try in open field instead of pot next time !
Was using Panchagavya organic fert lately, it might have caused the fungal infection.It starts from the bottom leaves and gradually catches up.Always run threw your check list. How is the ph? Could be a cal/mag problem but from the picture it looks to me like a black spot fungus. Check around were you are growing there maybe other plants around that have it and its Infecting your plant fungus is a funny cre ature it needs the right conditions and when it does It can be a big problem. Take off infected leaves and completely get rid of them next up would be an organic fungicide how late in flower are you. And if you do find the black spots on different plants in the area get rid of that also. But don't worry people on here will help. Oh and you said that it happened last year too so it's that time of the year were the conditions must be just right again from were you are from I bet it has been humid and moist lately.