From a fellow grower: auto seeds are suppose to flower on own no matter light time correct … so say I have to strains ( and we already know veg and flower time varies from strain to strain) so if one is already budding like crazy at a month and a week into it while two others are and one isnt do you just start a 12 and 12 cycle or keep running 18 on and 6 off? (yes they are all auto feminized)
Thats very common. Even auto seeds from the same plant/batch will flower at different times. Just like two kids with the same parents may physically mature at different times.
The only time you can expect timing to be exactly the same is with clones.
Photo period you control of course by light schedule.
If you’re ready for them to flower I would just drop light schedule to 12/12.