Looks like you used a fill flash on this - or maybe just general flash - due to the brightness on the stems. Although I like the idea of fill flash here (if that is how you achieved this look), I think it would be more effective on the seedheads. You might consider vignetting on this and a directional spotlight to bring the seedheads out - there is a lot going on in this photo - many overlapping textures - so highlighting just one area might help the viewer focus in.
Emily, this is a great subject and good background. You might try using a different light source other than you on camera flash - they tend to leave harsh shadows. Try a table lamp off to one side, or better yet go to the hardware store and buy an inexpensive light reflector with a clamp on device (or two). Then play with your lighting arrangement until you like the results.
You have some good shapes and colors to work with here. I think it's a great start. Perhaps a crop of the stems and focus on just a few of the dried blooms.