m0useanswered grow question 3 years ago Every auto will be different, something stress can cause them to enter flower really early, so if that was the same they may enter flower aorund week 3 or 4, and other may only enter flower aorund week 6 or 8.
When I start to see pistils beginning to form at all the nodes I say my plant is just about to flower as its showing its sex. once I see mini bud sites I consider it to be in flower. As they automatically flower its not really a switch you flip to get them their. Just be as gentle as possible, don't over feed or over/under water and they should run their course as best they can.
Good Luck!