Thanks! Glad you like them, yup all done in photoshop. nothing fancy, just add a stroke line outside the photo (vary the opacity to suit the BG chosen). Sometimes i use a box with 0% fill and apply the stroke around that instead.
My wife pointed to me a whole bunch of paper thin mushrooms/toadstools growing on a fermented patch, on our way to church. She always has a good eye for spotting interesting subjects!