Irie, you can more or less start flowering whenever you feel like it. like llam said room is a big factor, i for one have no room for tall plants so I veg max 10 days with CO2 and kick the lights. I get 80-88 grams a plant doing it this way. but then again it took a bit to get this version of the plant. Trial and error is the best way to learn, there is a ton of fine info here but nothing can beat seeing it happen for yourself. My advice would be to flower that baby and watch it grow cause once you kick those lights its gonna take off.