Upload & Sell: On
I like photographing flowers, too. One thing I'd suggest is to not center the subject in the frame; it looks better if you put the primary subject at one of the rule-of-thirds intersections. Also, in the second, and even more so in the third, there are other colorful areas that distract attention from the main flower. In the third, I don't think the second bloom is too bad, but the image would be better without the cut-off one at the edge.
I've taken the liberty of making some cropped versions of those two to illustrate what I mean. I made two different crops of the second one because I don't think the one with the flower not centered is necessarily much better - some might say there's too much dead space on the left.