I have mine (Dichaea trulla) mounted on a treefern slab with sphagnum moss
around the roots. They do need high humidity and constant moisture in my
experience. You might try a small pot with sphagnum, but that is to supply
the moisture. If you have one of the pendent species (i.e, Dichaea glauca)
mounting might be your best bet.

Good luck!

Ray Lloyd