rejected photos

Compare your work with current Stock inventory.  You'll see that Stock already contains millions, & millions, & millions of perfect flowers. This keyword has too much competition.  You'll never make a sale with flowers.

Look for subjects that have less representation -- paper clips, plastic bags or rubber bands.

Hope that helps.

DSC02997.JPG - DOF is too shallow, no bloom in the frame is entirely in focus 

DSC03002.JPG - blurry and cropped too close

While photographing flowers can be fun and good practice, I wouldn't bother uploading them to Adobe since there are already many millions of floral images in the database.

The depth of field is too shallow, so the area in focus is too small. Or the photo is out of focus.
Enlarge the photo to 100% on your PC monitor and check it.

The framing is bad.
You should take the photo so that the main character, the flower, is not cut off.

I think the impression can change just by changing the place where you focus.
Where do you focus when you take the photo?
Photographing flowers is complex.

What job? Your assets are not in focus. I've checked 2 of your flower images and none were sharp.