Welcome aboard! Our other Missouri members will have a wealth of good info for you. You can start building your knowledge base by checking out the threads in the
Soils and Fertilization Forum, and the stuff in the
Banana Plant Health Forum should also prove useful.
Cold Hardy Bananas will also help you when you decide to order more.
Best of luck - and you should know that it's likely you'll be pulling up your lawn to plant more bananas after your first year with them!