You're lacking compostion by a lot,... Pick one object and focus on that. Angle the camera in a way that makes the object stand out. Tip: Almost never put the object your focused on in the middle. The second picture was good. Although not too exciting.
When you take pictures of flowers, try doing it in the daylight. Also avoid the harsh light of your flash if you can help it. If you want to focus closer on a particular part of the flower, try using your macro function.
The first and third one.. Are not horrible, but would be hard to work with. Your pictures certainly need a bit of editing. Just to bring out the colors in the pictures. I liked the second picture, but you needed to edit the contrast to bring out the color of the flower and add a bit more blurring to the background.
All I did was raise the contrast and lower the lightenss and added a gaussin blur to the back ground.