Yes, you can mount orchids on rocks. This is a great way to display these beautiful flowers, and it also allows the roots to get the air they need to stay healthy. To do this, simply attach the orchid to a piece of cork bark using fishing line or wire. Then, place the cork bark on top of a few rocks in an arrangement that you like. Be sure to water the orchid regularly and mist the leaves as well. With proper care, your orchid will thrive and bloom for many years to come!