When to Flower? First Grow, Help!

Hey guys!
I appreciate all the help I got from y’all.. so so much. My grow is going great! I topped(fim) about a week ago and I have 4 tops! The fan leaves are huge (size of my hand) and I just had to transplant to a 3gal.
This growth has just blown me away, I wasn’t expecting this to be so quick!
ANYWAY I have that small box, and the light is now on the top of the box. Next paycheck I’m getting a way better light.
My question is when should I start to flower? I don’t want to run out of space! I would like to top again for more growth tips though, so I’m thinking 3-4 more weeks and then flip?

Last pic is my outdoor plant, just showing her off literally just stuck in the pot and water when it needs, gonna see what happens. Might clone to keep genetics

That would probably be perfect.
To set yourself a little rule of thumb,ask yourself how close to the light is the optimum distance.
Measure down to the pot hight your gonna use.
For me ,I start with half that distance to account for a 2x stretch. Most don't do that much and others will do more. So account for the strains stretch which is usually in the strains info.
If I have none I watch to see if it's squaty. Like yours. It would be fine even a little taller cuz she will not stretch a ton.
Good luck.