Nice one Wolf...As for Vandas and medium, I grow most of mine on galv. wire hooks bent into an elongated "S" shape. I set the plant on the bottom curve of the "S" (with its 'face' facing away from the wire,) use cable ties to secure it to the wire in one or two places, and drape some Spanish Moss over the roots...Hang in the greenhouse or on a tree branch, and you're set. So no...they don't need any medium, or even a basket for that matter...