Originally posted by Knight_Kin
2) You can only grant statehood to colonies on the same continent as your captial (There are some exceptions, lI believe it's historical ones).
Although the next couple of post mention culture, its not really clear if you don't already know about it so I'll mention it again. If a province has a majority of one of your state cultures you can grant it statehood even if it is not on your continent.