There are some reed stem Epi's that grow wild here in Hawaii and oddly enough, they look identical to the picture posted by Lorrain! Anyway, Ive seen them growing right in the ground but always in areas where the soil is thin. They attach to lava rock below. I guess you could dig a hole and fill it with bark, but that would rot one day. If you dig of hole and drop a rock in, it might last longer with fewer problems. I dont know how many boulders you have just lying around though waiting to be used as orchid media though!
