When you zoom in to 100% on each of your images, you will see that the focus on the blooms is not sharp enough. You should always inspect your images at 100% before submitting them, since that is exactly what the Moderators do.
There is a line by the edge that could mean there was a small shake plus there is a blue color fringe on the edge. Also I believe it is a little cool.
The first flower is not that sharp.
The third flower seem cool. I think if you add a little warmth to it it might be accepted.
Photographer and Nutrition Author
Je vous remercie pour ces explications très précieuses.
je vous souhaite une bonne journée