Outdoor feminized already in flowering?

Though I have to say, the plants I grew are pretty much entirely outdoor (except for like germination, sometimes).

I don't believe in the "hour" cycle shit, from experience. I've grown more than a thousand plants outdoor, It's not so much about the time as the season, or the change of the season. Like w en plants are grown midsummer, they flower quicker in general (coz the lighting is decreasing). Some plants flower quickly early spring. In winter though, many plants I've grown grow much longer (like they wait for summer).

Yeah I've had that happen with heavy indicas (which I consider mostly between sativa and ruderalis, so some "fast" things are practically autoflowers). I had some similar results with some other indica dominants (flowering within 6-8 weeks), a thing I call Sparse, and HSO Black D.O.G. Especially if you're used to more sativa-like plants, it's confusing. Seasonality, nutrients and such also affects that. Recently I've had plants grow fo r ~10-11 months (coz they were planted in winter).

Yes, anything under 14 hours triggers the flowering cycle, for future reference. Cheers

If she was getting 18 hours of light and then you cut it down to 13 hours of light this would be enough to trigger her to start flowering though if left she will return to veg in around 2 weeks or so if she is receiving 18 hours of light if she gets any less than that she will continue to flower. Hope this helps :)