I love dried roses and I have seen a lot of great photos of them in the past. It's quite peculiar to me how something can die and dry up and still hold a lot of strength in its own beauty.
I think that too much of this image is out of focus to provide a good overall impact. The depth of field you chose here is a bit too shallow for the closeup range in which you were working.
I believe you can also see how difficult it can be to create a perfectly white background :)
I think you have a strong subject opportunity here and with a little work, I think you can perfect this photo in those two areas that I mentioned :)