Btw, if one has trouble buying tree fern pots, Epiweb is not a bad alternative and it never decays.
https://www.firstrays.com/epiw...
https://www.glassboxtropicals....
Years ago I bought some slabs and baskets from First Rays, a couple are still in use, as a well established Orchids with sturdy roots will be impossible to dislodge.