some autos flower after 2 weeks,some do it after 7 weeks. I've had multiple pots of the same strain before, they didn't flower in sync and this is not a problem at all. Getting the same pheno with every seed is quite impossible or at least very rare for autos. breeding background brings a huge variety,this is the downside of autos.Give it some more time,assuming you'll wait for autos to finish before switching photos to 12/12 or else, even if jack is not an auto it'll be very big. just give it some more time.
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