Evan,
Tree fern fiber, Yes I buy in in bulk from a company called Hicks Orchid supply in Orlando. I pick it up once or twice a year, in spring at the local Orchid Society show, and again in Fall at EFG's " Orchtoberfest " since they are literally 2 miles from me. ( that in and of itself is dangerous) I just call them and tell them how much I want and they bring it. I use it in the mix I make up for my Hoyas and Orchids mostly but have started adding it in with the Aroid mixes also.
Hicks doesn't have a website but if you call them they will mail you a catalog. There are other places to get it tho I'm sure.
Here's a company that sell's it. ( not necessarily recommending them,just an example) scroll down the page a bit. Comes in different grades.
http://www.tindaraorchids.com/...
Oh....I grumble any time it's below 60ยบ........
