Auto refusing to flower

[mindfulinventor]

Hello,
first of all some details to my current grow:
Some time ago I planted two Apple Fritter autos from zamnesia in 15l smart pots.
Unfortunately I did not document their age but it's a semi accurate estimate of 5 weeks, 6 weeks tops.
Now to my "problem", they both developed quite fine as far as I can judge, I LST'd them both but one of them more than the other. One of them is pretty stubborn, not showing any signs of flower at all there's just lots of new growth visible. The other plant already shows plenty of flower. No male signs on the stubborn plant either so is she just a little enthusiastic in her veg?
Pics attached, a few of the stubborn and two of the normal plant.
Any help is greatly appreciated.

 

[Capt.Quirk]

The one time I had this happen with my auto Blue Berry Domina, when they weren't flowering by six weeks from sprout, I put them on a 12/12 light schedule, four days later they started to flower and after a total of seven days I went back to 18/6 with no problems. Let me say that I had grown this strain many times and without fail they would begin flower by day 30 from sprout so I knew I had to act. Very nice looking plants by the way. Good luck.

 

[mindfulinventor]

The one time I had this happen with my auto Blue Berry Domina, when they weren't flowering by six weeks from sprout, I put them on a 12/12 light schedule, four days later they started to flower and after a total of seven days I went back to 18/6 with no problems. Let me say that I had grown this strain many times and without fail they would begin flower by day 30 from sprout so I knew I had to act. Very nice looking plants by the way. Good luck.

Hey, thanks for your input, well I never grew this strain before so I do not have any referance whatsoever. Since her sister already began flowering a week ago something feels off. I'll wait for a few more days and then I will try putting her under a 12/12 schedule. Since it's an outdoor grow that will take a little more effort though.