I actually got the idea from post #11 of Frank's thread Picotee , decided to give it a go and here is the result. Thank you Frank
Let me explain how I did it for the members who also would like to try ;
1- Open your image in PS,
2- Create a new fill layer and choose a colour for the background (Layer>New Fill Layer>Solid Colour) ,
3- Duplicate your image layer and drag it on top of the fill layer,
4-On dragged layer, select the flower or whatever the subject is with a selection tool and add a mask.
You can always go back to the fill layer and change the colour of the background to your taste