Day 39.. first time growing autoflowers.. when do they flower?

[gemini_ranger]

I got a grow tent in my basement. Its constantly colder down there so I gotta run my space heater all the time. Its day 42 for mine. I was using fox farm grow big and big bud I think its called up until about a week and half ago. I seen some nitrogen burn happening. But I stopped and it is looking good. Had a lil big of too much light cause they grew faster than I expected. Tell you man. Leave the. Alone for one day lol. But im thinking of using the tiger bloom soon. What do yall think? Using foxfarm happy from soil and foxfarm ocean blend. Wanted to see which was better. I will have to see again next batch cause I started in the closet and moved to grow tent. So get a better test next time.