AW - I'll try not to cover what MB and Gary already did. One thing that always helps any photographer is considering exactly what you are trying to show the viewer before you shoot. The first shot I am not sure about, though the others seem self explanatory. You might want to eliminate the foreground road in those photos, it really doesn't add much other than to provide another plane. The bottom shot, I think if there were some flowers blooming on the stalks that it would work better. I like how the background is blurred, but the front stem is a little too soft here. I see your technical execution is getting better though - keep shooting, it's the best way to learn.
G