Check out the Michigan growers thread. There is a ton of info in there for growing outdoors in michigan. Where in the state are you growing?
Im growing Dr. Greenthumb's Iranian Auto Flower this year. Im also going to be growing some of Subcool's Jillybean. I know the Iranian will finish in time for michigan's early frost. But i am unsure about the Jillybean.
Good luck this year!