Candy Kush Auto

I have Come to learn from the breeder of my candy kush auto that it was unusual for them to not be flowering, and to be so big and vigorous in growth! They suggested I at this point switch the light cycle to 16 hours for 3 days and that should help trigger flowering but sadly there has been no change! I am going to keep them as you never know with an auto and I plan to when my other autos finish test the theory of a throwback female and switch to 12-12 and see what happens! Wish me luck.