Though I like the contrast of the different colors here, I think a couple of things would have really made this shot dynamic and stand out from the rest. First, I would play with the camera angle while shooting. Maybe try it from near the ground so that just a few of the flowers become the focal point, and others are in the background. Or, try to get far enough back so that the entire thing is shown, and doesn't look accidentally cut off. I think the purple and yellow flowers could be used to set up a nice picture of leading lines so that hte eyes are drawn into a picture and controlled by the actual subject. As it is, I just look at it and there is no real center of focus.
Secondly, I would have either used a faster shutter speed, or a tripod and gotten the focus crystal clear. It appears to have a bit of hand/camera shake to it. This may have helped the picture have more pop. If none of these things were possible, maybe you could have played with brightness/contrast or saturation to enhance the natural beauty you have chosen.
It is an interesting picture and a great idea. best to you in future challenges!!
Nice colors but I feel you could have done better with the composition. The top part of the picture is distracting and takes away from the flowers. You could have cropped it to eliminate that and captured the entire flower garden to the left and right to add symmetry.
Composition is a bit ackward and seems to crop off too much of the subject disproportionately. Exposure and saturation also seem a little on the dark side (maybe too much of a cloudy day to photograph brightly colored subjects). Background bush is also a little distracting.