need help with plant not flowering

[Suki]

If she's showing hairs under 18/6 I wouldn't go to 12/12. Sounds like she's just taking her time.

 

[automan2]

12/12 is your only choice to make everything flower. Of course, running autos and photos together for 20 yrs, I've never seen one not flower on time.

 

[Daipot]

Just to reiterate what others have said here; go 12/12. On the plus size you’ll end up with a monster plant seeing that you’ve vegged her for 12 weeks. On the downside, you are looking at a minimum of 9 weeks before you can harvest. Which will mean you’ll be chopping her down I. The new year. Assuming she is a photo of course