You’ll need a zoom lens or some other way of getting a long focal length. Stand well back and zoom in as much as you can on the flower, while also crouching down nice and low so you’re seeing it from the side. You’ll be getting pretty much the same composition as before, but working from much further away.
Why do that? Because providing that the stuff behind the flower is a reasonable distance away, it causes the background to go especially soft and blurry in a way that helps to draw more attention to the flower, like in the examples above. If you want to know why that happens, I explain it here.