Do you know what strain she is....?
Also what Grow Setup are You running...?
Type of Lights - Mh/Hps / CFL(5600k/2700k) / LED / T5(Fluro)
Lights - 18/6 - 20/4 - 24/0
Medium - Soil(compost) / Cocco / Hydro
Pot Size - 1g(4.5L) 2g(9L) etc / DWC
Nutrients - Grow? / Bloom?
IDK think you need to add a little more Info for more & better Answers...
I have heard(read) that some Auto's take longer(Depending on Setup, Grower and Strain)
Also that some need to be flipped to 12/12 to encourage em(Though shouldn't be the case, But it happens)
Can be for many reasons mikeymike83, maybe she NOT a true Auto? could be just a Photo-period...This is only my 1st Auto grow(KC45(Regs) so maybe someone from the Auto Section with more experience can help You more...1st thing I would do is ask Friend what strain She is and then Google that...
Peace & Good Growing
Edit: Any Pics???