Cork vs. Tree fern for mounts...?

[Ross]

I started to post about tree fern vs. cork renewability and didn't finish. I don't know for a fact, but I have read that tree fern is being depleated at a pretty fast rate (thus the creation of new products like epiweb.) Cork trees also get a real going over sometimes for "virgin cork" but most of the slabs we have access to are not virgin cork (I think that is correct.) I use mostly local tree branches, cedar slabs, cork, etc. because these products are more renewable than tree fern. Just my