The first image is unfocused, underexposed and poorly composed.
Same issue in the second image, plus the white parts of the flower might be blown out.
Water drops image is soft and over saturated
the fourth image is blurry and oversaturated
The final image is too dark and consists mostly of black, not well composed
i wouldn't bother submitting floral images.. There are already more than 29 million in the database and yours is unlikely to be accepted or ever sold. Similarly, sunset images are also over represented.
What @Jill_C said. Flowers taken in a garden as is will never be approved by the moderators even though there are similar images in the database. If you hope for approval, they must be carefully arranged by hand on a table top or whatever, well lit, with emphasis on extreme detail and bright colors and backgrounds. In other words, thoughtful still lifes, not randomly taken photos.