Identifying autos from unknown feminized seeds

[Korn]

Got some free feminized seeds along with and order. They have been growing under 12/12 lighting for 6 weeks (from seed to now) and are beginning to show female flowers. I’m trying to determine if they are autos or photos. Question. Can a photo show its sex this early or is it more likely to be an auto? The plants are about 28” tall. Thx for your input and ideas.

[SirSmksAlot]

I believe it'll be hard to know if it's an auto or not. The only way I can think of to know for sure is grow them under 18+ hours of light and see if they flower. Both photos and autos would be showing signs at 6 weeks under 12/12

[Korn]

Thank you, that’s what I was wanting to know.