Shuan.
Not sure I understand "oraganically".
Along these lines?
If you want to do it non destructively.
Add a layer mask, option "reveal all"
Draw a lose freehand selection around the image.
Feather it (depending on actual filesize, 20 used here) then invert selection and fill black.
Or send me the file and I'll do it for you. I owe you anyway.
.