Do you have a link to a site that has a list of seeds recommended for Missouri? I have a friend who is just getting started veggie gardening. She lives in the St. Joseph area.
http://extension.missouri.edu/p/G6201
This will give you a bunch of info for each veggie that you want to investigate.
Somewhere they have a planting calendar too, that gives the optimum time for planting in each of Missouri’s regions.