Using stone af only media?

[mojomick]

I have a Clowesia russeliana that was put into lava rock a couple of years ago. it was one lonely pseudobulb. It bloomed beautifully last year and I went to repot yesterday and low and behold there were so many roots that you couldn't even see the rock. I just put it into a bigger pot with new lava rock surrounding the root mass. It looks very happy. Moral of the story, the orchid just uses the media to hang on to..lt gets nothing from the rock, or bark, or whatever except anchoring.