your misted scene and paste it as a new layer (CTRL+L) just
above the background layer.. resize it to fit comfortably
without covering all the mosaic glass.
Copy your flower pot and paste as a new layer between the
misted scene and the frame. If any bits stick out beyond the
frame, carefully delete them with the eraser.
Give your flower-pot a drop shadow with these settings.....
Offset Horizontal & Vertical 4:
Opacity 80: Blur 10
Your layer palette should now look something like