Cut out the flower:



Insert the flower on the picture and don’t forget to select the Free Transform option to make the corrections on its size and on the flower’s placement:



Apply for the flower’s layer the next parameters (make a mouse’s click on the layer on the layers’ panel).
Blending Options>Outer Glow

 



Download out of Internet a set of ready to use brushes for Adobe Photoshop: Flowery by ca_pris.
Create a new layer and select by turn the downloaded brushes Flowery by ca_pris. The color in this case is black and each brush should be used three times, not moving the mouse (for getting a darker nuance). Place the layer containing the brushes lower than the layer containing the rose flower (on the layers’ panel).

 

 

 

 



Choose now the Pen Tool (P) to represent an element of black color. Make the corrections on the element’s shape, using the Convert Point Tool. Place the ornament’s layer lower than the layer containing the rose flower (on the layers’ panel).