A typical indoor cycle usually has a plant in veg(16-24 hours of light each day) for 2 months before you flip it into flower(12 hours of light each day).
I'm not a typical grower, though. For example:
I started my outdoor plants at the end of February because I had a feeling that I wanted to SCrog(use a trellis net to spread the plants out and maximize flower locations).
I hope this helps. Good luck!