they are not going to slow down in growing when they start flowering they are going to duble in size 5feet tall to 10feet i would tie down your tall ones i would also look up topping them if you do not have any more room to grow up i dont know much about it yet but look up topping asap hope that helps
When flowering I don't think they'll double, but yes they'll def get taller. I believe kirkland is going to be using 2 1000w hps (which is going to present another problem with his height restrictions). With that kind of power though, you will not see a lick of stretching and, depending on the strain, they might even stay the same height. Mine just get fatter, not taller, when I start to flower with my 2 1000 watters.
Blah, anywho, yeah, tie dem der bad boys down.