Interesting vegetation pictures are really hard to accomplish because the subject matter isn't brilliant, vibrant, or inspiring compared to the multitude of different flowering plants.
Picture #1 compositionally and subject wise, is the best of the set, but really suffers from only having the very front leaf in focus. All 3 leaves should have been sharp, while the background softness would have further emphasized your subject.
Picture #2 & 3 have less then stellar subject matter, are poorly composed, and the backgrounds just killed their respective compositions. In both pictures the backgrounds need to be completely out of focus to compliment the subject. As they are now, you can see that Reid trellis, and in the last picture the window, frame, brick wall, and concrete walkway, as well as the weird angle that it appears in your composition.
In order to improve compositionally with your florals, especially macro photographs, you need to really look at the entire image in your viewfinder; foreground, subject, and background. Learning how to control them, and your lighting are the keys to success.