i agree with the above poster as well... the only reason some people flower earlier than others is cuz they don't have the vertical room to let their plants veg for very long, so as long as you don't have any issues with that, than you should be golden... i also like to put stuff under my shorter plants in order to keep my canopy as even as i can so that the light will penetrate all of the plants evenly... i use books or whatever i have laying around at the time to put under the shorter plants to raise them up..