You have some beautiful budding flowers and the potential for great greens and reds but the lighting is preventing this composition from shining. The lighting is rather dark making the colors and composition feel dark and moody. Stereotypically Spring is about renewal with bright and cheery colors. I think if you had the opportunity to wait for some sunlight to shine upon these flowers it would help the composition. If that was not an option then some levels & curves and mayhap perhaps a copy of the original layer in another layer set at Screen blend mode with low opacity would help brighten up the scene.