you have to wait for the light cycle to reach about 12 hours on 12 hours off no matter where you are. The only plant that i know of that you do not need to worry about this is a lowryder. These plants do what they want when they want it. just think your plant will get nice and tall with a lot of bud by the time your daylight changed over by you, just keep an eye out for any possible cold nights when it get a little closer to mid sept and oct

GG23