You can add 2 inch sashing in between the blocks to add some width/length, then add several different kinds of borders, start with a narrow 1.5-2 inch solid color border, then add another about 3-4 inches, and the last can be 6 inches...in one of the borders, you can use tine 9-patch squares, or piano keys using colors from the flowers, etc. There several quilt books showing many different kinds of borders...