So here's my process:
Window is situated behind me.
Polystyrene is on an angle to the window to eliminate as much shadow as possible appearing directly behind the flowers.
I was using my 24-105mm lens. (I could have used my 50mm lens here too but I wanted a more wide angle shot that I could crop down).
Then I played in Photoshop and cropped some of the photos to suit. This next photo I have not altered at all except to increase the exposure level to get a nice crisp white background....perfect!
On another image I played with some textures and colour overlays. Then I added some subtle brushes to another layer and ended up with this.
Nice isn't it? - very subtle and romantic like.
Then I combined a couple of different ones and came up with this....
Give it a go.....try using a white sheet if you don't have any polystyrene or a pale coloured wall. Make sure you are between your light source and your subject to get the best results....but most of all just have fun!