The flowering stage😊
Autoflowers, whenever they feel like it.
LOL! I said this in my head before i even scrolled down! 
I have only grown twice (currently second). First grow all three began at almost exactly 4 weeks after breaking soil.
Current grow, first sings of flowering at 24 days after breaking soil.
Hope that helps.
Best of luck.
Some look like they are ready to pop. How many days?
I think right around 28 days ± to 35 is pretty typical. I have had one go as long as 51 days. It looks like yours will be well into it by then.
These Plant’s are at 5 weeks,how many hours of light would you recommend
Lighting for autos is variable and you will find many schedules and opinions. I am running 18/6. Ran 12/12 on the first grow. Interested in seeing any difference, but that is nearly impossible because I made so many mistakes and tried to grow too many plants for the space and lights.
People run autos 20/4 as well. A rest period is definitely recommended so many do not run 24/0; although, you will find some people who do to great success.