Are you using the pin dot for the main background colour? Are you going to fussy cut the flowers so they are the 5 inch falling charms? If you are fussy cutting the flowers, as long as they have a good border of the turquoise I think it will work.
It will still work if just the flowers are cut but there will not be much contrast between the purple background and the mainly purple flowers. You could just cut the 5 inch squares from the floral disregarding the pattern, if seeing just parts of flowers won't bug you.