Epidendrum radicans is a species of orchid. Common names include ground-rooting epidendrum, fire-star orchid, rainbow orchid, and reed-stem epidendrum. It is a common roadside weed at middle elevations in Central America. ? Fertilize with orchid food every two weeks and water about once per week. Keep the plant moist but the surface of the bark media should not be soggy. Orchids like to be pot bound, so re-potting is not terribly important. Do it once every three years or so in order to refresh the potting medium.