When should i start flowering these plants?

How much bigger should i veg before i begin to flower?




http://i611.photobucket.com/albums/tt194/maxswellsc/IMG_1191.jpg

how big is the room height wise?

depends on space, time, and lights. whats your set up?

I usually wait until my plants are about 10-15 inches tall

my setup... i have one 600watt H.P.S. which i am vegging under currently and one 1000watt M.H. vegging another room. My big room is about 8 feet tall and my small room is around 6 foot but i plan on making my big room the flowering room and keeping my small room to veg. Time really doesnt matter but i have been smoking some B.C. for about 2 months now and it is getting old.

here is a link to my grow journal https://www.rollitup.org/grow-journals/172838-first-indoor-hawaii-grow.html

yeah dude at least 15-20 in and it should good

alright...thanxs everyone!