(..a spur off of the discussion on abpo about orchids growing on tree
ferns.)

Question for the group:

Considering all of the growing media variants out there, how many of those
materials actually support orchids in the wild?

Coconut husk No
Douglas Fir bark No
Cork Oak bark No
Charcoal No
Perlite No
Sphagnum Maybe some very wet growing terrestrials, but I don't know of
any
Osmunda (root system of the Osmunda cinnamomia fern)
Tree fern Yes! (sometimes)

Others?

--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Artwork, Books and Lots of Free Info!