You can start when you flip to flower if you like and post the photos from sprout to flower then. It'll save you a lot of time and keep your jurnal tidy ;)
Thank you and happy fathers day back at you. This is your show, you do it your way. My grow log is messy, but by constantly updating day by day you do a better job of documenting your steps. More details. More entries the better, mho. Good luck
Yep what they all said. Its your grow diary so you start it and add to it as you see fit. I personally update daily with a minimum of pictures which is mostly so I can watch what they did last week 11 days ago whatever. But everyone is different which is why this forum is so nice. You don't have to follow any schedule just your own :)