This is a little off the beaten track, but here are some examples of the wood mounts I use for my tropicals. Often the mounts are the focal spot rather than the plants. These mounts are approximately 14" x 20" and I have some smaller and some larger, but most are of cedar, cypress, oak, pine and a few Gulf of Mexico driftwoods of some other exotic wood.

I use a 2-part epoxy to seal one surface and the epoxy really makes the wood color and grain "pop". The cured epoxy also seals the surface from UV and moisture for decades.

Are you using the epoxy on the 'back' side of the wood? or on the side that the plant adheres to? I'm just wondering if the roots can grab on to the epoxy and if it is toxic to them?

I mount them both ways. Once cured, the epoxy appears to be inert. So far the plants grow the same regardless. When I ship the mounted plants out, I tell the buyer that he can mount them either way. I may have the plant(s) mounted on the epoxy surface or on the natural wood surface, and it is easy to just reverse the mount. Some people want the beautiful wood to show and some prefer to have that surface against their wall or whatever the mount hangs on .Ken

That's really cool, they look fabulous. I just wondered if the roots could attach to the smooth surface, I guess so. I've tried driftwood a couple of times and the orchids have not done that well. Of course, I'm not great with orchids anyway even though they grow wild here. I generally put the piece of wood in the swimming pool for a week or so to kill whatever is in it and get rid of the salt and then in my pond for another week or two to get the chlorine out. I think I just don't attach them to the wood well enough or perhaps I'm not watering them enough.

Anyway, good work, they look fabulous.

I believe the problem with using driftwood collected from salt water is the retained salt. I leave my driftwood collected from the Gulf of Mexico outside to weather for six months, minimum. I want the rain and/or irrigation water to wash as much of the salt away as possible. But yes, mounted orchids need more frequent watering. I immerse my mounted ones (the mounts are a lot smaller than what you see posted) in a 5 gal. tub of 1/2 strength fertilizer solution every month, and leave them in the tub for 2-3 min. so that the plant, sphagnum/coconut fiber backing, and mount can really absorb the moisture well.

Thanks for the kind words. Ken