I like how the green and pink contrast with each other -- color is such a wonderful thing.
The biggest issue with this is the focus. It seems the camera focused primarily on a point behind the second flower, on some leaves. That may have been a happy mistake, though, because we were able to see the cool water drops on the leaves. But the foreground is so blurry we don't get a lot of detail on the flowers, and I'm sure there's a lot of rich details missing.
The brightness could also stand to be increased a bit. It appears the photo was taken with flash, but with the incorrect amount for the depth of field.
I can't give you specific techniques on how to improve the lighting and focus without knowing what kind of camera you're using, but there is a ton of free information from professional photographers about all the different makes and models of cameras, and how to effectively use all their features.
It is real critique, at least quite adequate! And I love when the text is well-organized!