It is hard to resist the charm of a beautiful rose and you have chosen an excellent specimen in good condition. It is hard to expose for white and get the detail you did in the petals, but you did this perfectly. To make the image even stronger, most of the time, it is better not to put you subject in the center. It's too static. Sometimes you have no choice, but in this case off center could have been selected. Also the two roses on each side draw you eye away from your subject so leave them out. Then place the rose off center and you'll have a most appealing photo.
