autoflowering problems

I have 4 autoflowering plant. 3 Bubblelicious, 1 Blue Mystic. They are on day 28 and they have not showed sex. From what i read, autoflowering plants should show sex withing 3 weeks. I bough my seeds from Nirvana. Should i induce flowering? Or just wait it out. I don't want them to get to big. Grow Journal with pics in sig.
Thanks

I think you should wait it out a bit

Should you induce flowering? If they are autoflowering then that is out of your control. They will grow as large as tey wnt and they will start flowering when they want, that is how an autoflowering strain works.