I think this photograph offers a very interesting perspective on the concept of "delicate." I wish you had taken the opportunity to post your own thoughts on this image in the Photographer's Comments box when you submitted it. When you ask for in-depth critique and don't post any of your own thoughts, it can lead me to believe that you don't have much interest in the image yourself.
I believe this photo is under-rated. I also believe that it could be a little stronger at the same time. The theme of delicate is good. The flower looks like it is blooming out of a harsh environment struggling to survive against the odds. The little splash of color in the otherwise monochromatic environment also adds to this effect nicely. I believe there is a little too much unused space in the composition. A slightly tighter view could possibly strengthen the theme...
Out-of-focus foreground is very distracting. I like the angle and the contrast of the red with the rest of the picture. Maybe would have decreased brightness of the highlights (sky) slightly.