When doing close up shots, use the macro mode in your camera (if you have it) otherwise don't take shots so close because its focusing on the background and just throws the whole perspective off.

Also when photographing outdoors its important to try to remove as much background clutter as possible. The fence kind of bothers me, but if you would have switched the camera to view the leaves from underneath aimed towards the sky, I think that would have been a muuuch nicer photo!

Also work on lighting just a tad, it just seems off. Does your camera have an outdoor setting (more popular, sunlight or cloudy)