There are many ways to photograph a flower. Lots of variables will affect the outcome of your photo. Lighting, background, your distance to subject, subject distance to background, aperture, lens, and so on…. A lot of the impact will come from the composition that you choose. How you set up the image design is entirely up to you. Will you go for a vertical or horizontal, will you get in tight or leave room around the flower to include some background, how much of your subject is in focus, what parts of the flower do you want in focus, will there be one or more subjects in the composition??? So many things to think about when taking a picture. It is not always as easy as some people think.
Below are three different compositions for the same Dahlia. In the first image the Dahlia is the supporting subject used as a juxtaposition. In the second shot the Dahlia is used as more of a background element. In the third image the Dahlia is the main and only subject. Which do you prefer and why.??