day 42 auto going into flower

Yes, pistils and calyxes clearly visible in pics 1 and 3. Yes she is an auto, a photoperiod plant will not start flowering at 18/6. Just keep at 18/6 and let her do her thing, reducing the light cycle seriously reduces the yield with autos. Autos are not as genetically stable as more highly developed photoperiod plants and depending on the amount of Ruderalis genes, which causes the auto flowering feature, as well as the growing environment, sex determination can occur anywhere from between 3 weeks (and even a bit earlier), to about 8 weeks in extreme cases. This genetic instability with autos put me off ever growing them again, as I do not believe autos offfer anything that can not already be achieved with photoperiod plants. If yield and ease of cultivation, along with predictability are what you like, stick with superior photoperiod plants would be my advice. Autos are probably best for people who can not alter timers! You can save a heap of electricity costs too by growing photoperiod plants. Using a fairly typical 12 week cycle as an example.......... Autos = 12 weeks of 18 hours of light which = 1512 hours of lights on time. Photoperiod plants - 4 weeks at 18 hours which = 504 hours, plus 8 weeks at 12/12 which = 672 hours, for a total of 1176 hours of lights on time. Therefore, over 12 weeks you save 336 hours of lights on time! I know which electricity bill I would prefer and I know whose "carbon footprint" is less too! Hope this helps, Organoman.

@gottagrowsometime is correct, autos are all over the place in terms of showing sex, they also seem to keep getting later and later when they do decide it. unless you shock them, I've done that in the past. dwarfed plants :( Good Luck!

so if she is only just showing signs of sex at day 42 from seed end start week 6 today she cant be an auto can she? surely thats a more than a bit late for an auto what are peoples recommendations on flipping to 12/12 now or shall i leave her and still assume she is an auto lol

Your instincts are correct, I'm seeing Pistils!! congrats. Don't get fooled when the calyx swell up later on in flower and think they are a pollen sacks on the stems. I did that before, almost chopped a plant overreacting lol. Good Luck With Your Grow!

Yeah your in luck. It's a girl!