I would simply arrange the blocks in a pleasing way.
You can Google "state flower quilt" and then click on "images" to see how others have done it. I don't think there are any rules!
I found this website where she placed her flowers in alphabetical order by state (but it was easy because the 2-letter abbreviation for each state was embroidered on the corresponding flower):
http://turkeyfeathers.typepad.com/tu...uilt-show.html