ok thank you puff your the only one who give me a number yet !
That's what I was saying, Mr. Kenoster! There IS no number!
Plants vary, and will be ready at different times. It also depends on your setup, lights, etcetera. And keeping them in veg for a while won't increase your yield "a little bit". You can double, triple, or quadruple it. Seriously.
Like I said, look at the nodes. That is the PLANT indicating to you that it's primed for flowering. Numbers are arbitrary- there is no magic number.
I don't claim to know everything, but I do know this.
~Ethno