As others have noted, there is much to love here!
The tonal placement it not quite to my liking. I wish the petals were a hair more separated from the background, they look slightly blown out on my monitor. In fact maybe what I want is essentially the same tone to the petals, but a little more texture in them. I'd also like the stems a little darker. In fact, the darker the better. Since they're already quite grey, it appears that you like the contrast between the light and the dark, and I say, BANG on that theme!
Lastly, I do like the composition, it's an effective use of negative space. I do find the stems leading my eye away from the visual center as much as they lead to it. I'm not sure how to fix that, but it feels like some minor adjustments there would give a stronger visual flow in the right direction. That's a pretty minor quibble, though.