Some take longer than others its pretty unique to the breeder like 420 fast buds seeds seem to grow very quickly and flower quick too but I havent tested many auto breeders so I havnt run into this problem yet. I would do as brave says see if you can help her along by switching the light cycle if that doesent help though she will flower eventully.
Hi fellow grower, this seems to be an inherent problem with autos. More and more are failing to self flower. The best advice i can give is to put her into a 12/12 light schedule. This will force her in to flower. I hope this helps, good luck and happy growing
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