Very nice! I love flowers and especially roses, so this one suits me well! But the outline on the forehead/nose make that area a little flat. The rest is very realistic and good, so it would probably have been better to just put a simple grey area behind there to bring out the forehead and nose, instead of having an outline.
Now THIS is the art on DeviantArt I've been looking for. After scrolling through weird pony fanfiction, coming across this is like a gust of cool creative wind. Keep it up! I look forward to more work by you!