I recommend you to use this picture of red rose flower for your desktop background. An awesome photo of rose flower in close up with extreme zoom. So, you can see this flower in details and each parts of the flower.
I use this photo as one of the collection of the pictures of red roses flower. This picture was designed in high resolution with 4K resolution. You will get this picture in 3820×2160 pixels by downloading it in original size. You can also convert it into smaller size such as 1920×1080 pixels.