There is no 'should'.

You can implement flowering any time you please. I talked to a guy with 60 plants in a box in 24oz cups. Just one bud in a cup.

You start the flowering to suit your needs if you want big plants give them a few months, shorts ones a lot less.

I forget, seems like they're still going to grow in size 30%? after flowering begins. Also you can bend them to spread them out.

So it's up to you when to flower.
tacman7 Reviewed by tacman7 on . how long to determine sex How long do you veg a plant before detemining sex. If I'm lucky to get a lady then how long until harvest time? Oh, indoor growing. Rating: 5