Hallo,
a little from my side. I think the rest of them have talked abaout it being to tightly cropped.
you can still make the sepal the subject but you have to be careful of the other parts of the stalk that was also the same distance as the sepal. if not , like your photo, it seems like there's two focus area.
IMO, The lightening is insufficient. Can't really make out the color of the sepal. You can try moving yourself or moving the rose so that the lights are more complementing to the whole flower without having the compromising the sepal part.
so much for now... gtg