m0useanswered grow question 3y 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!