This image works exceptionally well from lighting, focus, composition, and color standpoints. I particularly want to mention how well the
colors are brought together. The green vase and background introduce the combination of yellow and blue. This allows the yellow flower to coexist next to the purple flowers (red+blue). The purple flowers in turn allow the other flowers to flow with the red flowers without creating an unpleasing color clash because the eye is led through the spectrum without any huge jumps.