I do a lot of panel work for clients and I definetly would leave it whole. The background is a light color and takes up a lot of space on the panel. So If it was mine I would start with a deeper tone from the panel and make 4 inch (or the closest size to go around the panel in equal blocks). I would make them simple blocks, pinwheels, or a diamond in the block. Then a plain substantial border maybe 3 to 4 inches. In a color that compliments another flower in the panel.
If you could find a piece of fabric with a flower or Pattern that compliments the panel use them for at the four corners.
That's my take. It would be a great looking quilt and wouldn't take a large amount of time.
All the best
It is a beautiful panel.
R