Nice colours, very vibrant. the focus seems a bit soft to me on what I preceive as the focal point (the flower). I my eyes tend to go towards the more sharp parts of the pic, which are for me the tip of the leaf to the left of the pic. Good luck in the challenge!
I really like the composition here. It is really well balanced and strong by having the red/pink flowers in the lower right and the green leaves in teh upper left. There are some parts fo the flower petals that look a bit oversharpened to me, though.
One of the reasons I didn't enter this challenge was because I was not creative enough to think of a picture that exhibited complementary colors and didn't involve a flower... I see that you too have failed at at least one of these. Your flash, or whatever light source, bleached the color on the pinkish red of the upper-most leaf... A bit more contrast, softer light, along with a little cropping of the dead vegetation would have produced a decent photograph. 4