WHOA! slow down buddy. its an auto and theres a good chance that half-strength is gonna be your full-strength. Lots of people say they have best results never exceeding half strength the entire grow. You should start out at 1/4 or even 1/5 strength for an auto. I usually give them their first feeding 1.5-2 weeks after planting because a couple in my first grow started showing def at 2 weeks. I give them grow formula until they have clearly shown their sex and then start the bloom formula then. Remember the nute motto: less is more!