i just happened to have the perfect ground cover photo that i'd taken last winter and hadn't had occasion to use it.
i followed directions except that i duped the masked layer [the border] and applied a gaussian blur of 8 to the *layer mask* [not the image]. this gives me a soft, almost glowing, effect that i like. i also varied the size of the leaves.
i also added a few extra leaves on the blurred layer [via the mask] et voila!
this is a great technique!